PLATE XIV. 
Transverse sections of Echinoid Radioles. 
(Figs. 488—441, 
438. «Cidaris» dorsata typica, from St. Cassian 
(Brit. Mus., E 10,090); a section near the 
proximal end of the shaft of a typical peri- 
pheral radiole A 2 
439. «Cidaris» dorsata Les, eat Remus 
lemhegy (Brit. Mus., E 10091); a section 
corresponding to fig. 438 
440. «Cidaris» alata subalata, from St. Gassian 
(Brit. Mus., E 10092); a section correspond- 
Pag. 
173 
174 
all x 30 diam.) 
ing to the previous ones; the vane is at 
the lower end of the figure, the smooth 
adoral face is on the right . 
441. «Cidaris» alata poculiformis, from reruns 
lemhegy (Brit. Mus., E 10093); a section 
corresponding to the previous ones; the 
vane is at the lower left-hand corner, the 
adapical face is probably that on the left. 
Pag. 
174 
174 
All the figures were drawn from the sections by G. T. GwILLiAm, under the Author's direction, at a magni- 
fication of 40 diam., 
and were reduced by photography to the present scale. 
