PLATE 32. 



Farrea sp. Station 4631. 

 Figures 1-3. 



1. — View of the skeleton-net; magnified 2; phot. Zeiss, anastig. 167 mm. 



2, 3. — The two faces of the skeleton-net of the wall of the tubular sponge; magnified 8; phot. Zeiss, 



planar 50 mm. : 



2, the dermal face; 



3, the gastral face. 



Euretid. Station 4651. 

 Figures 4-6. 



4. — View of the skeleton-net; natural size; phot. Zeiss, anastig. 480/412 mm. 



5, 6. — The two faces of the skeleton-net of the wall of the funnel-shaped sponge; magnified 8; phot, 



Zeiss, planar 50 mm.: 



5, the inner, concave (gastral?) face; 



6, the outer, convex (dermal?) face. 



Chonelasma sp. Station 3689. 

 Figures 7-9. 



7. — View of the skeleton-net; natural size; phot. Zeiss, anastig. 480/412 mm. 



8, 9. — The two faces of the skeleton-net of the thick, curved, lamellar sponge; magnified 8; phot. Zeiss, 



planar 50 mm.: 



8, the convex (dermal?) face; 



9, the concave (gastral?) face. 



Caulophacid. Station 3689. 

 Figures 10-12. 



10. — View of the skeleton-net; natural size; phot. Zeiss, anastig. 480/412 mm. 



11, 12. — The two faces of the skeleton-net of the wall of the tubular specimen; magnified 8; phot. 



Zeiss, planar 50 mm. : 



11, the inner, concave (gastral?) face; 



12, the outer, convex (dermal?) face. 



Hexactinella sp. Station 4631. 

 Figures 13-15. 



13. — View of the skeleton-net; natural size; phot. Zeiss, anastig. 480/412 mm. 



14, 15. — The two faces of the skeleton-net of the thick-walled, funnel-shaped sponge; magnified 8; 



phot. Zeiss, planar 50 mm.: 



14, the outer, convex face; 



15, the inner, concave face. 



