III : 17-". 



<ir;i\ UB therefore highly hypothetical; rsp-ri:illy -in- 



..in- leemfl l> have seen Cray's type, and its ijrnrrir eharaeters, are 

 wholly unknown. I hav- never leeo a "gb|UCUI linen 



of this species "wluteioside;" they arc always blue. The cbi 



of name made l>y Deshayes must be adopted on account oi 

 earlier ('. riri'H* of Spender. 



('. PELLI88ERPENTIB <,)iioy & Gaimard. PI. 37, figs. 14, 15, 16, 17, 



18. 



Shell oval, rather elevated, hardly cari nated, the side-slopes some- 

 what convex. Surface lusterless. Color a rather dull and din-y 

 olive or olive-green marked with black along the ridge and on the 

 sides of some valves. 



The lateral areas are moderately raised and sculptured with 3 or 

 4 roir* of Distinct tubercle*. Central areas having *tron</, irregular 

 (jn>irf/i irrinklc*, <unl fine longitudinal riblets. Anterior valve larger 

 and much more elevated than the posterior, both being sculptured 

 with numerous regular rows of distinct tubercles, the rows increasing 

 by splitting. Posterior valve depressed, the low mucro in front 

 of the middle. 



Inside blue, indistinctly blotched with olive-green. Sutural- 

 plates rounded, the sinus broad and deep, smooth or hardly dentic- 

 ulate. Anterior valve having 12, central valves 1, postejpor valve 

 12 slits ; teeth blunt, pectinated. Eaves broad. 



Girdle wide, alternately light and dark; scales (pi. 37, fig. 17) 

 rather large and wide, often showing a slight tendency to carination 

 in the middle, microscopically striated. 



Length 30, breadth 23 mill. 



Heiv Zealand. 



Chiton pelliserpentiH Q. & G., Voy. de P Astrolabe, Zool. iii, Moll., 

 p. 381, t. 74, f. 17-22 (1834). DESK., in Lam., An. s. Vert, vii, p. 

 508 (1836). Chiton j>elli*-erpenti KEKVI:, Conch. Icon., t. 15, f! 

 84. HUTTON, Cat, Mar. Moll. N. Z. 1873, p. 4C : Man. N. /, Moll. 

 1880, p. 111. HADDON, Challenger Polyplac., p. '2'2. 



This is one of the most abundant New Zealand Chitons. Its 

 sculpture is frequently obscured or lost by erosion. C. sim'/nirl is 

 closely allied, but it differs in color-pattern, in the poll." licit central 

 areas, whilst the surface of pelli-*erpenfis is lusterless, and in the 

 sculpture of the central areas. The median valves of pellisserpenti* 



