PLATE XV. 



Transverse sections of Echinoid Radiolcs. 



Pag. 



442. «r(V/iiW.v» clfconilu, from .St, Cassian (Brit. 



Mus., E 4(307), X 60 diam 18(i 



443. (iCidarisy WctccMcri, from St. Cassian, a radiole 



corresponding to C. catcnifcra Mun.st. 

 (Brit. Mus., E 10094), x 30 diam. . . . l'J3 



444. i.<Cidarisi> similis, from St. Cassian (lirit. Mus., 



Pag. 



E lOOB.*)) ; section passing through the side 



of a slightly compressed radiole, X 60 diam. 18i) 

 445 <!.Cidarisy> IVissnmnni, from St. Cassian (Brit. 



Mus., E 10096), X 30 diam 197 



44'). «CidL>r!s» Wiss/iiiiiiiti rndis, from Cserhat 



(Brit. .Mus., E 10097), x 60 diam. ... 200 



.Ml the ligures were drawn trom the sections hy G. T. Gwilliam, under the .\uthor's direction, at a magni- 

 fication of 80 and 40 diameters respectively, and were reduced by photography to the present scale. 



20* 



