10 LEPIDOPLEURU8. 



of the total length of the body, the proportion with regard to the 

 length of the foot is 1 : 4.5. They are of moderate size, the middle 

 being the largest, slightly decreasing behind but much more so in 

 front. (Haddon.') 



L. FULIGINATUS Adams & Reeve. PI. 4, fig. 88. 



Shell elongate, elevated, whitish, tawny-ashen sometimes soiled ; 

 apices eroded ; jugum rounded. Mucro moderately elevated, posterior 

 slope very concave ; jugal area hardly defined ; central area hardly 

 sculptured ; lateral areas quite elevated, frequently sculptured with 

 irregular concentric incremental wrinkles; jugal sinus wide and 

 straight. Girdle narrow, very thin, thickly covered with very deli- 

 cate small and fugacious scales, which are somewhat elongated and 

 purplish. (Cpr.} Length 20, breadth 9} mill. ; divergence 90. 



Korea. 



Chiton fuliginatus AD. & RVE., Conch. Icon. t. 26, f. 174, 1847. 

 Leptochiton fuliginatus A. & R., CPU. ms. p. 4, 5. DALL, Proc. U. 

 S. Nat. Mus. 1878, p. 318, 316. 



This specimen is an approach to Stenoplax in its outward form 

 andthe character of its girdle covering. The scales appear smooth, 

 and have the shape of those of Stenoplax. It has a curious general 

 resemblance to Trachydermon albus, but the absence of insertion 

 plates at once distinguishes it. The concentric furbelowing at the 

 sides is variable. (Qor. from B. M. specimens.) 



See remarks under L. cancellatus for further distinguishing char- 

 acters of this species. 



L. CATILLUS Reeve. PI. 4, fig. 87. 



Shell ovate, attenuated anteriorly ; terminal valves and lateral 

 areas of the rest concentrically ridged, radiated with minute gran- 

 ules, central areas very finely grooved and cancellated, whitish, liga- 

 ment horny, arenaceous (Reeved) 



Habitat unknown. 



C. catillus Rv. Conch. Icon. t. 23, f. 159, 1847 .Leptochiton 

 catillus Rv., CPR. MS. p. 6. 



Might easily be taken for stramineus Sby. outside. Coarsely 

 granose-1 irate, like the Mogador specimen [L. granoliratus] ; girdle 

 gravelly. The sculpture consists of longitudinal granose lira? upon 

 the central areas, and radiating granose lirse upon the lateral areas. 

 No insertion plates, but the line of them is rugose. Length 9?, 

 breadth 62 mill. ; divergence 110. Jugum rounded. (Cpr.) 



