GASTEROPODA. 315 
Cuiron IncaNus (Gould). 
Testa solida, oblongo-ovalis, valdé convexa, cinereo et nigro variegata, 
concentricé undulato-striata, granulis sparsis nigris aspersa, ad dorsum 
subcarinata et longitudinaliter nigro bifasciata ; arets lateralibus viz 
distinctis: margo aculets inequalibus curtis curvatis nigris et canes- 
centibus andutus. 
Chiton incanus, Goutp; Proceed. Boston Soc. Nat. Hist., 1. 145. 
July 1846. Expedition Shells, 6. 
SHELL solid, elongated oval, slightly narrowed anteriorly, convexly 
elevated and slightly carinated along the back. General colour a 
hoary white, here and there clouded with black, and with an inter- 
rupted black stripe each side of the summit. The surface 1s very 
minutely and irregularly granulated, so as to appear rugose under the 
lens; occasionally, and more especially on the lateral areas, these 
granules are shining jet black, so that the surface, when closely exa- 
mined, appears sprinkled with isolated black dots. The valves are 
concentrically striated, the strie a little undulating, deep, distinct, 
and somewhat imbricated at the anterior margin, becoming fainter at 
the apex and sides. The lateral areas are very slightly raised, not 
distinctly defined, and with faint indications of a few radiating lines; 
a few, minute, radiating lines may also be seen on the central areas, 
near the margin. Margin rather broad, clothed with short, unequal, 
slightly curved, black, aud hoary spines, which are generally disposed 
in alternate clusters ef black and white. Interior pale red and violet, 
somewhat iridescent. 
Length an inch and three-tenths ; breadth three-fourths of an inch. 
Inhabits New South Wales, Australia. From Mrs. Mitchell. 
Like C. piceus in general colouring and appearance, and still more 
like C. petholatus, which has a hairy margin. 
Figure 432, back of the shell; 432 a, details of sculpture, maguified. 
