PLATE 30. 



Geodia agassizii Lendenfeld (adult). 



Figures 1-17. 



1, 2. — Group of listers from ii centrifugal spicule-preparation, of a specimen from Station 2SS6; magni- 

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



I, focused higher; 2, focused lower; 



a, small sirongylosphaerasters; b, large oxyast«r. 



3. — Large oxysphaeraster of a specimen from Station 2978; magnified l.SOO; 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 oxya.ster of a specimen from Station 4193: magnified l.SOO; u. v. phot. Zeiss, q. 

 monochr. 1.7., q. oc. 10. 



C-9. — Small .strongylosphacrasters: 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. Zei.ss, q. monochr. 1.7, q. oc. 10: 

 a, small strongylosphaerasters ; b, large oxyasters. 

 11-17. — Parts of sterrasters in difTerent 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 side of a sterraster somewhat older than the one represented in Figs. 11 



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



14, [)art 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, 16, part of the side opposite the umbilicus of two sterrasters still older, in which the spine verti- 



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

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

 cxtende<l and crowned liy verticils of slender spines. 



