Bell — Echinoderms collected hy the 88. " FingaV 529 



Echini from 500 fms. appeared to be made up of E. acutus and 

 E. elegans. 



Echinus microstoma, Wyv. Th. 



35 miles off Black Rock, Co. Mayo, 250 fms. (St. 203.) 



Sfpatangus purpureus, 0. F. Miill. 

 One small specimen from 220 fms., 40 miles off Achill Head 

 (St. 63). 



iipataiigns Raschi, Loven. 



One specimen from 144 fms., 30 miles of Achill Head (St. 64) 

 and a larger one from 500 fms., 54 miles off Achill Head (St. 70) ; 

 45 miles off Black Eock, 500 fm. (St. 201) and 50 miles off Bolus 

 Head, 220 fms. (St. 124). 



DESCEIPTION OF THE PLATES. 



Plate XXIII. 

 Astropecten SpJienoplax. 



Figure A, 1-3 show three stages in the extent of the gap between the 



infero-marginals, due to the more or less wedge-shaped form of 



the plates. 

 Figure B, 1-3 show three stages in the spinulation of the supero-margi- 



nals ; in B 1 there are no spines, in B 2 some of tlie plates bear 



spines, in B 3 many hear spines. 



Plate XXIY. 



Figures of Asthenosoma hystrix, after drawings hy Mr. E. "W. L. Holt 

 of fresh specimens ; the details from preserved specimens. The 

 differences in colour and the size of the plates are very marked 

 in these two. 



Plate XXY. 

 Figures to show the variations in the calcification of the plates of the 

 corona of A. hystrix, x 2. 



1. From a specimen in which calcification is extensive, and the coronal 



plates touch one another. 



2. From a specimen in which calcification has been complete in part only 



of the plates of the corona so that there is distinct fenestration. 



3. From a specimen in which calcification is much less complete over 



the whole area of the plates of the corona. 



