Figures 13–19 in First record of the family Spengeliidae (Hemichordata: Enteropneusta) from Chinese waters, with description of a new species

Figures 13–19. Glandiceps qingdaoensis, new species, anatomical and histological characteristics. (13) Transverse section through the median region of collar showing perihaemal coelom and mesentery. (14) Longitudinal section through median-posterior region of collar showing small disconnected medullary cavities arranged in a line and collar dorsal nerve strand. (15) Transverse section through the branchial region showing well-developed digestive portion and branchial portion. (16) Magnified upper part of Figure 15, showing dorsal septum, dorsal vessel, and splanchnic nerve-fibre layer. (17) Magnified lower part of Figure 15, showing ventral septum, ventral vessel, and nerve-fibre layer. (18) Longitudinal section through the branchial genital region showing gill bar, tongue bar, and distinct vesicle encircling every tongue bar. (19) Transverse section through intestine, showing the thin wall of digestive canal.