CHITON. 177 



bifurcating. Interior: anterior valve with 8, central 1, posterior 

 valves 10 slits. Length 30, breadth 15 mill. ; divergence 105. 



Sydney. 



Easily recognized by the fleshy color and small, beaked, mantle- 

 scales ; the side sculpture of limans (with which this species agrees 

 in the scales) is. very different in pattern. (CprJ) 



C. CANALICULATUS Quoy & Gaimard. PI. 36, figs. 4, 5, 6. 



Shell small, oblong, strongly elevated, carinated, the side-slopes 

 straight, steep. End valves and lateral areas pink, central areas 

 yellowish, dorsal ridge pink with an olive-green stripe on each side. 

 Sometimes olivaceous, or olive and rose. 



The lateral areas are strongly raised and sculptured with 4 or 5 

 radiating ribs which are regularly cut into low beads, and which 

 often split toward the lower margin. Central areas having a narrow 

 smooth space upon the ridge, sculptured on each side with about 16 

 strong longitudinal ribs, separated by deep intervals ; posterior mar- 

 gins of valves crenulated. Anterior valve having about 22 granose 

 radiating ribs ; posterior valve having about ] 6 granose radiating 

 ribs, the umbo slightly in front of the middle, the slope behind it a 

 little concave. Interior whitish; sinus rather deep and narrow. 



Girdle covered with compactly imbricating, convex, shining obso- 

 letely striated small scales (pi. 36, fig. 6.) 



Length 14, breadth 11 mill. 



Taxman Bay's (Q. & G.), and Stewart Island (Hutton), New Zea- 

 land. 



Chiton canaliculatus Q. & G., Voy. Astrol. Zool. iii, p. 394, atlas, 

 t. 75, f. 37-42 (1834). Chiton stangeri REEVE, Conch. Icon., t. 22, 

 f. 150 (1847). Chiton inscidptus A. ADAMS, P. Z. S. 1852, p. 91, t. 

 16, f. 4. c/. HUTTON, Man. N. Z. Moll. 1880, p. Ill, 112. 



Allied, in its acutely elevated contour, to G.jugosus,l>ut differing 

 markedly in the granose-ribbed lateral areas. It is usually very 

 brilliantly colored with rose-pink and buff, but olivaceous forms also 

 occur. The latter may be distinguished from C. sinclairi by the 

 differently sculptured central areas. Professor Hutton (in Hit.) 

 suggests to me the identity of stangeri and inscidptus. The latter 

 seems to agree altogether with Quoy's canaliculatus. 



The girdle-scales (pi. 36, fig. 6) are smaller than in C. jugosus, 

 and they are much less distinctly striated than in 0. sinclairi or (7. 

 pellisserpentis. 

 12 



