FIGURE 20 in <strong>New glass sponges (Porifera: Hexactinellida) from deep waters of the central Aleutian Islands, Alaska</strong>

FIGURE 20. Spicules of Caulophacus (Caulophacus) adakensis n. sp., from the Aleutian Islands (SEM). A. Hypodermal pentactin, whole and enlarged ray ends. B. Hypoatrial pentactin, whole and enlarged ray ends. B1. Center of hypoatrial pentactin showing proximal spines. C. Two parenchymal macrohexactins with enlarged ray end. C1. Center of hypoatrial macrohexactin showing proximal spines. D. Dermal pinular hexactins, variation in form, and enlarged tangential ray end (* denotes most common form). E. Atrial pinular hexactins (* denotes most common form); all pinular hexactins to same scale. F. Diactin, whole and enlarged end and middle segments of thin and thick forms. G. Microsclere terminal ray end discs, end and side views. H. Discohexactin. I. Hemidiscohexaster. J. Discohexaster.