FIGURE 15 in <strong>New glass sponges (Porifera: Hexactinellida) from deep waters of the central Aleutian Islands, Alaska</strong>

FIGURE 15. Spicules of Aulosaccus schulzei Ijima, from the Aleutian Islands (SEM). A. Hypodermal pentactin and enlarged tangential ray end. B. Dermalia: stauractine, pentactine and hexactine forms with enlarged ray end. C. Atrialia: pentactine, stauractine and hexactine atrialia with enlarged ray end. D. Large principal diactin with enlarged ends. E. Thin regular diactin with enlarged end and middle segment. F. Short atrial diactin with enlarged end and middle segment. G. Whole solaster with inset of spherical centrum in LM, terminal ray end and disc face. H. Oxy-tip microscleres including an oxyhexactin, hemioxyhexaster, oxytriactin with short spur and enlargment of the branching area of a hemioxyhexaster. I. Whole microdiscohexaster with enlargement of a terminal ray end.