CHITON. 169 



Species of Japan, East Indies, Polynesia, etc. 



C. AJUATILIS Reeve. PL 38, figs. 33, 34. 



Shell ovate, valves very closely elevately striated throughout, 

 stride here and there but rarely, bifurcately-divergent, interstices 

 rather excavated. Bronze-green, yellowish in the middle, with nar- 

 row transverse green bands. Ligament squamately coriaceous, 

 scales pale sea green. 



A peculiar smoothly bronzed shell, painted across the middle with 

 narrow bands or ripples of green. (Reeve.) 



Tsu-sima, Japan. 



C. aquatilis REEVE, Conch. Icon., f. 73. 



Reeve gives no locality for this species. The figures on my 

 plate are copies of his. 



Carpenter writes as follows of Reeve's type specimen : One spec- 

 imen made up of two, only the valves stuck together. I counted 

 just eleven scales in one corner, though Reeve describes and figures 

 it as complete. The very insertion-plates are in great measure 

 rubbed off. It may equal my C. denxiliratus in poor condition. 

 Anterior valve having 10, central valves 1, posterior valve 13 slits; 

 teeth pectinated ; eaves short. Shell rather elevated, the dorsal 

 ridge sharpish. Central areas with extremely close fine parallel 

 strise, ju gal area not defined. Lateral areas not elevated, having 

 18 radiating lines, extremely close and fine, as on central areas, but 

 rather more developed ; the end valves similarly sculptured, mucro 

 in front of the middle; posterior slope very concave. Marked 

 "? Japan" ; and the habitat of a specimen sent by Damon for pur- 

 chase is Tsu-sima, Japan. The valves alone, without girdle, and 

 irregularly placed measure : 



Length 40, breadth 23 mill. ; divergence 105. 



C. DENSILIRATUS Carpenter, n. sp. 



Shell oval, solid, elevated, the jugum acute; mucro scarcely 

 prominent, subanterior. Ashy or pale brown, irregularly clouded 

 with chestnut or black, often elegantly dotted with darker or paler. 



Central areas having about 25 riblets on each side of the jugum 

 and parallel with it, obsolete at the ridge; lateral areas well defined, 

 having 8-10 lirse, sometimes bifurcating; end valves having 60-70 

 such line. 



