PLATE 30. 



Geodia agassizii Lendenfeld (adult). 

 Figures 1-17. 



], 2. — Group of asters from a centrifugal spicule-preparation, of a specimen from Station 2886; magni- 

 fied 1800; u. V. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 



I, focused higher; 2, focused lower; 



a, small strongylosphaerasters; b, large oxyaster. 



3. — Large oxysphaeraster of a specimen from Station 2978; magnified 1800; u. v. phot. Zeiss, q. mon- 



ochr. 1.7, q. oc. 10. 



4. — Large oxyaster of a specimen from Station 2978; magnified 1800; u. v. phot. Zeiss, q. monochr. 



1.7, q. oc. 10. 



5. — Part of a large oxyaster of a specimen from Station 4193; magnified 1800; u. v. phot. Zeiss, q. 



monochr. 1.7., q. oc. 10. 



C-9. — Small strongylosphaerasters; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 



6, 8, of a specimen from Station 4193; 



7, 9, of a specimen from Station 3088. 



10. — Group of asters from a centrifugal spicule-preparation of a specimen from Station 3168; magnified 

 1800; u. V. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 

 a, small strongylosphaerasters; b, large oxyasters. 

 11-17. — Parts of sterrasters in different stages of development (growth) of a specimen from Station 

 3088; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 



II, 12, part of the side opposite the umbilicus of a quite young sterraster with slender, distally 

 sharp-pointed rays; 



11, focused lower; 12, focused higher; 



13, part of the umbilical sitle of a steri-aster somewhat older than the one represented in Figs. 11 



and 12, with stouter, but still simple, pointed rays; 



14, part of the umbilical side of a sterraster older than the one represented in Fig. 13, the rays of 



which are still simple but already stout and blunt; 



15, IG, part of the side opposite the umbilicus of two sterrasters still older, in which the spine verti- 



cils are beginning to appear on the summits of the rays; 

 17, part of the side opposite the umbilicus of a young sterraster with rays already distally 

 extended and crowned by verticils of slender spines. 



