PLATE 8. 



Caulophacus schulzei Wilson. 



Figs. 1, 5, 6, 8-12, 15, 21, 22, 27 — specimen E. 



Figs. 2-4, 13, 16, 18-20, 24 —specimen B. 



Figs. 7, 17, 23, 25, 26 — specimen D. 



Figs. 14, 28, 29 —specimen C. 



1-7. — -Side-views of hypodermal and hypogastral pcntactines; magnified 30; phot. Zeiss, planar 

 20 mm.: 



I, 5, 6, of hypodermal or hypogastral pentactines of specimen E; 



2-4, of hypogastral pentactines of specimen B; 7, of a hypogastral pentactine of specimen D. 

 8-12. — Group of spicules from a spiculc-preparation of specimen E; magnified 100; phot. Zeiss, apochr. 

 16, compens. oc. 6: 

 8, 9, pinules; 

 10, a digcohexactine; 



II, a hemidiscohexaster; 



12, a hypodermal or hypogastral pentactine with one lateral ray reduced in length and terminally 



thickened. 



13-17. — Hypodermal and hypogastral pentactines and parts of such; magnified 100; phot. Zeiss 

 apochr. 16, compens. oc. 6: 



13, the lateral raj'S of a hypogastral pentactine of specimen B; 



14, the lateral rays of a hypogastral pentactine of specimen C; 



15, part of the lateral rays of a hypodermal or hypogastral pentactine of specimen E; 



16, side-view of the central part of a hypogastral pentactine of specimen B; 



17, side-view of a hypodermal pentactine of specimen D. 



18-27. — Apical views of the lateral rays of pentactines; magnified 30; phot. Zeiss, planar 20 mm.: 

 18-20, of hypodermal pentactines of specimen B; 

 21, 22, 27, of hypodermal or hypogastral pentactines of specimen E; 



23, of a large hexactine-derivate pentactine of specimen D; 



24, of a large hexactine-derivate pentactine of specimen B; 



25, 26, of hypogastral pentactines of specimen D. 



28, 29. — Radial section through the marginal part of the body of specimen C; magnified 10; phot. 

 Zeiss, planar 50 mm.: 



28, stained with magenta; 



29, stained with azur; 



a, gastral face; b, margin of sponge-body; c, dermal face. 



