CHITON. 171 



having about 12 little impressed, distant sulci, parallel to the dorsal 

 ridge. Mucro anterior-subcentral, moderately projecting. Interior 

 having 8-9 slits in end valves, 1 in median valves; teeth acute, 

 deeply pectinated ; eaves short ; sinus wide, flat, toothed. Girdle 

 furnished with large, solid, imbricating but striated scales. 

 Length Hi, width 6i, alt. 3 mill. 



Tahiti (Pease.) 



Chiton (Lophyrus) perviridis CPU., P. Z. S. 1865, p. 511. Lophy- 

 rus perviridis PEASE, Amer. Journ. Conch, vii, p. 194. 



A solitary specimen of this interesting species is very like C. vires- 

 cens Eve. in general appearance ; but the mantle of that species is 

 nearly smooth and the valves scarcely sculptured. This shell is of 

 a uniform bright green. It has the aspect of Lepidopleurus [Lepid- 

 ozona] ; but the insertion-plates though sharp, are deeply pectinated. 

 It differs from most other Chitons in having the scales distinctly 

 striated, as in (7. striatosquamosus. (Cpr.~) 



C. BURMANUS Carpenter, n. sp. 



Shell elevated, with acute dorsal ridge; olivaceous or red, having 

 a white blotch on the tail valve behind the mucro. 



Whole surface of the valves finely quincuncially granulated ; 

 central areas having about 20 sharp and distinct ribs on each side, 

 parallel to the dorsal ridge, upon which they are finer and closer ; 

 lateral areas having 3 to 5 rows of stout granules, some of the rows 

 not reaching to the apex. End valves having 25 (or fewer) rows of 

 stout granules. Mucro of the tail valve median, the slope behind it 

 very concave. 



Interior having 8 slits in the anterior, 1 in the median, 11 in the 

 posterior valve ; teeth sharp but distinctly pectinated ; eaves short. 



Girdle covered with rather roundish oval scales of large size. 



Length 19, breadth 10* mill.; divergence 96. 



Coast of Arakan, British fiurmah, under stones at low water. 



The British Museum contains four specimens, of which three are 

 olivaceous, the other red. The above description is from Car- 

 penter's MS. 



Species of Australia, New Zealand, etc. 



The species of these regions are mostly of moderate or small size, 

 and generally the mucro is central and the scales microscopically 

 striated. 



