PLATE XVIII. 
Transverse sections of Echinoid Radioles. 
454. Radiolus complanatus, from St. Cassian (Brit. 
Mus., E 10103), x 30 diam. 
455. «Cidaris» Roemeri, from St. Cabana (Brit. 
Mus., E 10104), x 30 diam. 5 
456. The same, a small portion enlarged, x YO idan 
457. Radiolus lineola major, from Jeruzsalemhegy 
(Brit. Mus., £10105). The darker areas 
Pag Pag 
are the only parts at all clear, but the rest 
224 is restored, partly on the evidence of an- 
other section; X 30 diam... . . 231 
224 | 458. Radiolus lineola minor, from the Quatey i near 
224 Cutting I (Brit. Mus., E 10106). Part of 
the section, being rather more obscure than 
| the rest, has been left blank. * 30 diam. 232 
All figures were drawn from the sections by G. T. GWILLIAM, under the Author’s direction, at a magnification 
of 120 and 40 diameters respectively, and were reduced by photography to the present scale. 
