GASTEROPODA. 325 
Figures 412, 412qa, dorsal and ventral views of the shell; 4124, 
details of sculpture; 412c, branchie; 412d, a single branchia, en- 
larged. 
CHITON JASPIDEUS (Gould). 
Testa ovata, tenuis, carinata, ubique minutissimé punctata, coloribus 
rosacets plus minusve saturatis picta ; areis centralibus linets minutis 
granosis confertissimé striatis ; arets lateralibus indistinctis, et lineis 
tribus vel quatuor sparsim granosis radiatim notatis ; valvis termina- 
hbus granoso-striatts, postica excavata ; margine coriaceo, pruinoso. 
Chiton jaspideus, GouLp; Proceed. Boston Soc. Nat. Hist., 11. 143. 
July 1846. Expedition Shells, 4. 
SHELL broad-ovate, thin and light, somewhat strongly carinated ; 
under a magnifier it is found to be everywhere punctured in quin- 
cunx. It is generally dark liver-red, clouded with longitudinal pen- 
cillings of more or less deep rose-red colours ; central areas closely and 
minutely marked with granulated, longitudinal lines; lateral areas 
small, distinguished by their greater smoothness, and having four or 
five rather imperfect granular lines upon them; terminal valves with 
radiating lines of distant granules, the posterior one excavated and 
with a transverse ridge, and strongly marked with the lines of growth. 
Margin coriaceous, covered with short, hoary down. 
Length one inch; breadth seven-tenths of an inch. 
Inhabits Callao. 
Resembles in size, shape, and sculpture C. apiculatus, Say, but the 
sculpture is much more delicate, and the colour, resembling some 
varieties of jasper, is quite distinctive. Were it not that Mr. Reeve 
could scarcely have given the sculpture of Ch. cerasinus, Chem., so 
simple, compared with the systematic arrangement of granules on this 
shell, we might, from general appearances, regard the two as identical. 
Figure 414, the shell, above; 414 a, details of sculpture, enlarged. 
82 
