PLATE 28. 



Geodia agassizii Lendenfeld (adult). 

 Figures 1-28. 



1-7. — Cladomcs of mesoprotriaenes; magnified 75, phot. Zeiss, apochr. 16, compens. oc. 6: 



1, with long and stout curved clades, one of which is terminally abruptly bent, and a rather long 



epirhabd, of a specimen from Station 4199; 



2, with rather long and stout curved clades and long epirhabtl, of a specimen from Station 4199; 



3, with stout and short cur\-ed clades and short epirhabd, of a specimen from Station 4199; 



4, with short, nearly straight clades and medium epirhabd, of a specimen from Station 4551; 



5, with slender, slightly curved clades and rather long epirhabd, of a specimen from Station 2978; 



6, with long ami slender, curved clades and short epirhabd, of a specimen from Station 2978; 



7, with rather stout, nearly straight clades and very long epirhabd, of a specimen from Station 4199. 

 8-11. — The branched ends of quite irregular tele- and mesoclade-Uke spicules; magnified 75; phot. 



Zeiss, apochr. 16, compens. oc. 6; 



8, the branched end of a long rhabd with three conic branch-rays (clades) lying nearly in the same 



plane as the rhabd (rhabdome), of a specimen from Station 4199; 



9, the branched end of a rhabd with two branch-rays lying in a straight line and together appearing 



as a small -style attached obhquely to the end of the rhabd, of a specimen from Station 2887; 



10, the branched end of an amphiox-like spicule with two very oblique, backwardly directed spines 



in.ierted a little below the end, of a specimen from Station 2887; 



1 1 , the branched end of an amphiox-like spicule, with a straight branch-ray arising nearly vertically 



a little distance below one end, of a specimen from Station 2887. 

 12-14. — Parts of stout, club-shaped styles; iiwgnified 75; phot. Zeiss, apochr. 16, compens. oc. 6; 

 of specimens from Station 4193: 



12, 13, the thick blunt ends of two such styles; 



14, the thin pointed end of the style, the other end of which is represented in Fig. 13. 

 15. — An en<l of a regular large choanosomal amphiox, of a specimen from Station 316S; magnified 75; 



phot. Zeiss, apochr. 16, compens. oc. 6. 

 16, 17. — Groups of spicules from spicule-preparations; magnified 20; phot. Zeiss, planar 20: 



16, of a specimen from Station 2978; 



17, of a specimen from Station 2886; 



a, large choanosomal amphioxes; b, a club-shaped style; c, an anatriaene; d, a mesopro- 

 triaene. 

 18-28. — Cladomes of anaclades; magnified 75; phot. Zeiss, apochr. 16, compens. oc. 6: 



18, of an anatriaene with short, somewhat unequal clades, of a specimen from Station 2887; 



19, of an anatriaene with short, rather stout, somewhat unequal clades, of a specimen from Station 



4193; 



20, 21, of anatriaenes with long and slender, equal clades, of a specimen from Station 2978; 



22, of an anatriaene with rather long and fairly slender, etiual clades, of a specimen from Station 2887; 



23, of an anatriaene with short, .stout, equal clades, of a specimen from Station 4199; 



24, of an anatriaene with long and stout, equal clades, of a specimen from Station 4551 ; 



25, of an anatriaene with long and .stout, equal clades, of a specimen from Station 4193; 



26, of an anatriaene with small, nearly straight, equal clades, of a .specimen from Station 4199; 



27, of an anatriaene with slender, very unequal clades, of a specimen from Station 3168; 



28, of an anadiaene, of a specimen from Station 3168. 



