CHITON. 175 



C. DISCOLOR Souverbie. PI. 60, figs. 3, 4. 



Shell ovate-oblong, the back carinated, urabones subrostrate; 

 gray-green or yellowish-red, with longitudinal more or less pallid 

 and more or less numerous spots. End valves ornamented with 

 about 20 radiating series of quite strong tubercles (some of the rays 

 being short, intercalated between the others) ; lateral areas having 

 three series of tubercles and a fourth intercalated shorter series. 

 Central areas sculptured on each side of the smooth dorsal carina 

 with impressed, subobliquely longitudinal grooves. Girdle leathery 

 and scaly. Dimensions, exclusive of the girdle, which is very incom- 

 plete in our two examples (probably immature) ; length 19, breadth 

 9 mill, (flow.) 



Art Island, N. Caledonian Archipelago (Mus. Bordeaux.) 



Chiton discolor Souv., Journ. de Conch. 1866, p. 252, t. 9, f. 1, la. 

 C. miniaceus CPU., MS., Mus. Cuming. 



Carpenter's unpublished species seems to be the same as this, 

 although until the types of discolor are examined, we cannot be 

 certain. Carpenter's description here follows : 



(7. miniaceus Cpr. Shell elevated, oval, the jugum acute ; vivid 

 vermilion, the margin tessellated with paler. Mucro median, little 

 elevated. Entire surface minutely punctate ; central areas having 

 about 25 subparallel grooves on each side, obsolete on the dorsal 

 Bridge; lateral areas elevated, bearing 3-4 strong, radiating lirse, 

 which are strongly nodose. End valves having about 20 lirse. 

 Interior : anterior valve having 8, central 1, posterior 10 slits ; teeth 

 deeply pectinated ; sinus wide, minutely denticulated. Girdle 

 covered with normal imbricating scales. 



Length 27 , breadth 20 mill.; divergence 100. 



New Caledonia. 



Mus. Cum., no. 59. Easily recognized by the strong sculpture 

 and brilliant vermilion color. ( Cpr.} 



C. MURICATUS A. Adams. PI. 37, figs. 12, 13. 



Shell oblong, much elevated in the middle ; black-brown and 

 white variegated. End valves and lateral areas radiately ribbed, 

 the ribs ornamented with elevated acute grains; tail valve umbon- 

 ated in the middle. Central areas longitudinally deeply lirate, the 

 umbones smooth, elevated, somewhat produced. Girdle scaly, the 

 scales mucronated, imbricating, with suberect apices. (Ad.~) 



