220 



BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



In certain fossil comatulids, however, the controdorsal is very long, and llio 

 question arose whether in such cases it might not be composed of several columnals 

 fused instead of only a single one as it had been ])roved to be in Antedon. P. II. 

 Caii)cnter was at first inclined to believe that this might be true; but when he had 



Fig. 1-16. 



Fiu. 147 



FiO. 14S. 



Fig. 1J9. 



Fig. 150. 



Fios. 14ft-l50.— 146, Dorsal view or the centrodobsal of a specimen of Comatella haculata from Torres Straits 

 (AFTER r. H. Carpenter). 147, Dorsal view op the centrodorsal of a specimek of Nemaster lineata from Brazil 

 (AFTER P. H. Carpenter). 14.S, Dorsal view of tue centrodorsal of a specimen of Comatula Solaris from .\i'strai.ia 

 (after p. H. Carpenter). 149, Dorsal view of the centrodorsal of a specimen of Comatl-la Solaris from Australia 

 (after p. H. Carpenter). 150, Dorsal view of the centrodorsal of a specimen of Comatula pectinata (after 

 P. n. Carpenter). 



occasion to describe the recent Zenomeira columnaris (figs. 215, 216, p. 241, and 

 558, pi. 5), in which the centrodorsal reaches an extreme length, ho was unable to 

 find any evidence whatever which would warrant an opinion that more than one 

 columnal was involved in its composition. 



