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Fig. 2. Tyrannosaurus rex Osborn, LACM 23844 in The Cranial Morphology of Tyrannosaurus rex

Fig. 2. Tyrannosaurus rex Osborn, LACM 23844, right maxilla represented diagramatically in medial view. — The exposed sinus chambers may be seen just anterodorsal (a, b and c; the anteriormost is not lettered) and posterodorsal (d) to the maxillary fenestra. The presumed tooth impressions (1, 2 and 3) may also be seen anteriorly, just below the. broken palatal process. 0.3x.

Fig. 6 in The Cranial Morphology of Tyrannosaurus rex

Fig. 6. Tyrannosaurus rex Osborn, reconstruction of the right pterygoid. — A. Lateral view. B. Dorsal view. Based on LACM 23844 and MOR 008. The extent and form of the anterior and lateral processes are unknown. Scale bar 10 cm.

Fig. 1. Tyrannosaurus rex Osborn, LACM 23844 in The Cranial Morphology of Tyrannosaurus rex

Fig. 1. Tyrannosaurus rex Osborn, LACM 23844, right premaxilla. — A. Medial view. B. Posterior view. C. Lateral view. D. Ventral view. Dotted lines indicate broken nasal process. 0.3 X.

Fig. 5 in The Cranial Morphology of Tyrannosaurus rex

Fig. 5. Tyrannosaurus rex Osborn, reconstruction of the vomer. — A. Left lateral view. B. Ventral view. The extreme posterior portion is unknown. The insets indicate which parts of the reconstruction are based on LACM 23844 and which on MOR 008. Scale bar 10 cm.

Fig. 4. Tyrannosaurus rex Osborn, LACM 23844 in The Cranial Morphology of Tyrannosaurus rex

Fig. 4. Tyrannosaurus rex Osborn, LACM 23844, left jugal in lateral view. — The presumed extent of the internal chambers is shown in dotted line. The medial foramen also so indicated, at the end of the short passage directed posterodorsally from the area of the lateral foramen. 0.3 X.

Fig. 8 in The Cranial Morphology of Tyrannosaurus rex

Fig. 8. Tyrannosaurus rex Osborn, diagram of left articular in dorsal view. — Based on LACM 23844. The extent of the sinus chamber is indicated by the dotted line. 0.3 X.

Fig. 3. Tyrannosaurus rex Osborn, LACM 23844 in The Cranial Morphology of Tyrannosaurus rex

Fig. 3. Tyrannosaurus rex Osborn, LACM 23844, right lachrymal represented diagramatically in medial view. — The upper sinus chambers are exposed, and the chamber in the descending ramus is indicated by dotted lines. The position of the lateral foramen is also indicated in dotted line. 0.3 X.

Plate 5 in The Cranial Morphology of Tyrannosaurus rex

Plate 5 Tyrannosaurus rex Osborn, Hell Creek Fm., Jordan (Montana), AMNH 5027 and LACM 23844. Fig. 1. Right jugal of LACM 23844 in ventral view, showing the presumed articular surface for the ectopterygoid (arrows). Fig. 2. Right jugal of LACM 23844 in lateral view, showing the articular surface for the lachrymal adjacent to scale bar. Fig. 3. Dorsal portion of left lateral temporal fenestra of AMNH 5027 in lateral view, showing the smooth surface (just in front of the "Sq.") interpreted as an attachment area for the external mandibular adductors. Scale bars 10 cm.

Plate 1 in The Cranial Morphology of Tyrannosaurus rex

Plate 1 Tyrannosaurus rex Osborn, Hell Creek Fm., Jordan (Montana), LACM 23844. Fig. 1. Right lachrymal in lateral view. Fig, 2. Right lachrymal in medial view. The medial wall of the posterior part of the horizontal ramus is missing, revealing the internal chambers. Fig. 3. Right premaxilla in lateral view. The lateral tooth (arrow) has apparently been broken, after which the broken surface was planed off. Fig. 4. Left quadratojugal in medial view. The articular surfaces for the quadrate are seen at the left. Fig. 5. Left quadratojugal in lateral view. Scale bars 10 cm.

FIGURE 6 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 6—-Dorsal view of anterior extremity of left dentary NMMNH P ~ 1013~ l, 311161101 anterior' [to O right Broken tooth in alveolus 1' no 10 4 illustrates cross-sectional v shape of the tooth Interdental plates surround the alveoli. Bar scale 10 cm

FIGURE 5 —C1 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 5 —C1 oseup of anterobuccal edge of largest isolated tooth in Fig. 4. illustrating serrations.

FIGURE 4 —lsolated lower teeth associated with left dentary NMMNH P-lol 3 - I in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 4 —lsolated lower teeth associated with left dentary NMMNH P-lol 3 - I; top, buceal sides; bottom. lingual sides. Bar scale= 5 cm

FIGURE 3 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 3 —Detail of anterior extremity of buccal surface of left dentary NMMNH P- 1013 - 1 Bar scale: 10 cm

FIGURE 1 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 1—Left dentary of Tyrannosaurus rex (NMMNH P- 1013- 1): top, buccal (outer) side; bottom, lingual (inner) side. Bar scale = 10 cm.

FIGURE 8 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 8 -— Right prearticular NMMNH P~10l 3 ~ 1, top, buccal surface; bottom, lingual surface. Bar scale - 10 cm

FIGURE 7—Isolated tooth associated with left dentary NMMNH P in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 7—Isolated tooth associated with left dentary NMMNH P ~lOl3~l, from either right dentary or left maxilla

FIGURE 2 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 2—Detail of anterior extremity of lingual surface of left dentary NMMNH P- 1013-1. including the symphysis. lnterclental plates are the rugose bone at upper edge of dentary, lining the alveoli Bar scale — 10 cm

FIGURE 2 in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 4—lsolated lower teeth associated with left dentary NMMNH P-lol 3 - I in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 4—lsolated lower teeth associated with left dentary NMMNH P-lol 3 - I; top, buceal sides; bottom. lingual sides. Bar scale= 5 cm

FIGURE 7—Isolated tooth associated with left dentary NMMNH P in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico

FIGURE 7—Isolated tooth associated with left dentary NMMNH P~lOl3~l, from either right dentary or left maxilla