PLATE XV. 
Transverse 
442. «Cidaris» decorata, from St. Cassian (Brit. 
Mus., E 4607), x 60 diam. . 
443. «Cidaris» Waechteri, from St. Cassian, a radiole 
corresponding to C. catenifera Muwnsv. 
(Brit. Mus., E 10094), x 30 diam. 
444, «Cidaris» similis, from St. Cassian (Brit. Mus., 
sections of Echinoid 
Radioles. 
Pag. Pag. 
| E 10095) ; section passing through the side 
186 | of a slightly compressed radiole, x 60 diam. 189 
| 445 «Cidaris» Wissmanni, from St. Cassian (Brit. 
| Mus., E 10096), x 30 diam. Ba 197 
193 | 446. «Cidaris» Wissmanni rudis, from Cserhat 
| (Brit. Mus., E 10097), x 60 diam. 200 
All the figures were drawn from the sections by G. T. GwILLIAM, under the Author’s direction, at a magni- 
fication of 50 and 40 diameters respectively, and were reduced by photography to the present scale. 
20% 
