PLATE XV. 
Transverse sections 
Pag. 
442. «Cidaris» decorata, from St. Cassian (Brit. 
Mus., E 4607), X 60 diam.186 
448. « Cidaris » Waechteri, from St.Cassian, a radiole 
corresponding to C. catenifera Münst. 
(Brit. Mus., E 10094), x 80 diam. . . . 198 
444. « Cidaris » siinilis, from St. Cassian (Brit. Mus., 
f Echinoid Radiolcs. 
Pag. 
E 10095) ; section passing through the side 
of a slightly eompressed radiole, X 60 diam. 189 
445 «Cidaris» IVissmanni, from St. Cassian (Brit. 
Mus., E 10096), X 80 diam.197 
446. « Cidaris » Wissmanni rudis, from Cserhat 
(Brit. Mus., E 10097), X 60 diam. . . . 200 
All the figures were drawn lrom the sections by G. T. Gwilliam, under the Author’s direction, at a magni- 
fication of 80 and 40 diameters respcctively, and were reduced by photography to the present scale. 
I 
20 * 
