CHITON.—Puate XIV. 
areas of the rest serrated along the posterior edge, 
radiately ridged, obliquely interrupted with oblong 
callosities, central areas smooth at the top, closely 
finely ridged on each side; olive-ash, variegated here 
and there of a darker tint; ligament squamately cori- 
aceous, tessellated with large olive spots. 
Variety 8. (Fig. 77 4.) 
Testa omnino nitide olivaceo-nigricans. 
Shell altogether shining olive-black. 
Hab. West Indies. 
The difference between this and the C. squamosus, is 
only to be detected by observing that the longitudinal 
ridges of the central areas are finer, closer, and not curved ; 
| each species has its dark bronze variety, and this variation * 
| of sculpture though apparently trifling is constant in both. 
