312 



COMPARATIVE ANATOMY 



CHAP. 



FIG. 259. A, Cystoblastus Leuchtenbergi. 

 1, Internulial ; 2, 3, radial ; '.>, liasal : 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. 



i 





FIG. 258. Antedon incisa (after P. H. 

 Carpenter). 1. Arms ; 2, cirri. 



FIG. 260. Protocrinus oviformis, Eichwald 

 (after Volborth). 2, Anus; 1, third aperture ; :;. 

 ambulacrum. 



