172 CHITON. 



C. QUOYI Deshayes. PL 37, figs. 6, 7, 8. 



Shell oval, rather elevated, carinated, the side-slopes straight. 

 Surface having a smooth and polished appearance but very finely 

 striated. Color generally a very dark olive-green, but sometimes 

 yellowish-brown marked with olive on the sides and ends, or clear 

 yellow with rays of olive or brown. 



Lateral areas slightly raised, sculptured with numerous narrow, 

 delicate and slightly crenulated radiating threads. Central areas 

 covered with still finer longitudinal strise. End valves sculptured 

 like the lateral areas, the two about equal in size; mucro of the 

 rather raised tail valve a little in front of the middle. 



Interior sky-blue, marked under the beaks with olive-brown rays. 

 Sinus rather square, finely denticulate. Anterior valve having 9- 

 10, central 1, posterior 13-14 slits; teeth crenulated outside. 



Girdle covered with smooth convex imbricating scales, mostly 

 light blue, but often having dark brown scales mingled with them. 



Length 37, breadth 22 mill. 



Auckland to Dunedin, New Zealand, in pools under stones, between 

 tides. 



Chiton viridis Q. & G., Voy. Astrol. iii, p. 383, t. 74, f. 23-28 

 (1834). Not Chiton extus viridis, intus Candidas of Chemnitz, Con- 

 chyl. Cab. viii, p. 277, t. 94, f. 794, 795 (1785), nor Ch. viridis 

 Spengler, q. v. Chiton quoyi DESK, in Lam., Anim. s. Vert, vii, p. 

 509 (1836). REEVE, Conch. Icon., t. 13, f. 68 (1847). Chiton 

 glaucus HUTTON, Man. N. Z. Moll., p. 112 (1880.) 



? Chiton glaucus GRAY, Spicilegia Zoologica pt. i, p. 5 (1828). 

 ? Lophyrm glaucus ANGAS, P. Z. S. 1867, p. 222. 



This species differs from all other true Chitons of New Zealand in 

 its finely sculptured, comparatively smooth surface, resembling in 

 this respect the 0. magnificm of South America. It is a well known 

 New Zealand form, and has also been reported from Port Jackson, 

 Australia, by Angas, under the name glaucu* ; but I have not been 

 able to confirm this by the comparison of specimens from the latter 

 locality, which may safely be omitted until authoritatively con- 

 firmed. 



The locality of Gray's C. glaucus was unknown, he did not figure 

 his specimen, which had lost its girdle, and he states that it was 

 white inside, glaucus green outside. The identification of Quoy and 

 Gaimard's well described and figured shells from New Zealand with 



