88 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXV. 



Endoxocrinus parrw, in which the conditions are quite different from 

 those in Isocrinus decomis; the two II Br series represented, as well 

 as the mode of origin of the cords, make the identification certain. 



Fig. 2. — Diagram showing the course of the axial canals 

 in Isocrinus decorus in their natural tosition. 



'?: : >.. 



M: 





mfh 



H 



f i g. 3. portion 



of stem of very 

 young Isocrinus 

 decorus, before 

 the develop- 

 ment of the pe- 

 taloid sectors. 



4^®^ 



Fig. 4. — Joint faces in a very young stem of Isocrinus decorus, but somewhat older 

 than the stem shown in the preceding figure. 



The axial canals in Isocrinus decorus and MetacHnus rotund us 

 (figs. 1 and 2) appear to be similar, so much so that I can not find any 

 differences between them; also, the canals in an individual of the 



