CHITON.—Ptatz I. 
Species 4. (Fig. a, and 6. Mus. Cuming.) 
Curron Sroxesi. Chit. testd ovatd, valvis terminalibus 
striis peculiariter interruptis, undulatis,radiatis, ceteris 
areis centralibus longitudinaliter fortiter tenuiliratis, 
areis lateralibus, fortiter elevato-striatis, striis subdis- 
tantibus undulatis, obliqué decussatim divergentibus ; 
olivaceo-nigricante, maculis perpaucis pallidis utrinque 
umbones; ligamento fortiter granoso-coriaceo, viridi- 
olivaceo, nigro-marmorato. 
Sroxes’ Curron. Shell ovate, terminal valves radiated 
with peculiarly interrupted waved strize, the rest with 
the central areas strongly longitudinally finely stri- 
ated, lateral areas strongly elevately striated  strize 
rather distant, waved and obliquely diverging across ; 
olive-black, with a few pale blotches near the umbones; 
ligament strongly granosely coriaceous, greenish- 
olive, marbled with black. 
Variety B. Fig. 4, 0. 
Testa parva undique rufo varia. 
Shell small, variegated with red throughout. 
BropeErip, Pro. Zool. Soc.. 1832. 
Hab. St. Elena, West Columbia (under stones at low 
water); Cuming. 
The style of the cross diverging strize of the lateral areas 
should be carefully noticed in order to distinguish this 
species from its congeners. 
