312 



' '( i M PARA TIVE ANA TOMY 



CHAP. 



1 



,/ 



Ki . , - - 



V - l 'i\ 



FIG. 259. A, Cystoblastus Leuchtenbergi. 

 1, Interradial ; 2, 3, radial; 9, basal; 10, infra- 

 basal ; 8, anus ; 6, genital aperture. B, From 

 the oral side (after Volborth). 4, Mouth ; 5, 

 ambulacrum. Fig. 295, p. 332, shows the apical 

 side. 



Frci. -2:^. Antedon incisa (after P. H. 

 Carpenter). I. Arms; 2, cirri. 



FIG. 260. Protocrinus oviformis. Eichwald 

 (after Volborth). _'. Anus; 1, third aperture : 3, 

 ambulacrum. 



