ISCHNOCHITON. 135 



I. LENTIGINOSUS Sowerby. PI. 27, fig. 44. 



Shell oval, carinated, smooth ; back elevated ; lateral areas incon- 

 spicuous. Color tawny brown, ornamented with rounded blue spots. 

 Margin minutely scaly. Length 15, breadth 9 mill. (Sowb.) 



" Newcastle, Australia." 



C. lentiginosus SOWB., The Magazine of Natural History, con- 

 ducted by Edw. Charles worth, iv, new series, p. 293, June, 1840 ; 

 Conch. Illustr., f. 120. 



Chiton cyaneopunctatus KRAUSS, Die Sudafric. Moll., p. 40. 



Except in being somewhat larger, and said to be from a different 

 locality, this seems to be absolutely the same as /. cyaneopunctatus 

 Krauss. It is likely that the Australian habitat assigned to lenti- 

 ginosus is a mistake. The description of cyaneopunctatus here 

 follows : 



C. cyaneopunctatus Krauss. (PI. 27, figs. 40-43). Shell small, 

 oblong-ovate, thin, semi-pellucid, convex, carinated, shining, ashy, 

 orange or brown, closely painted with dots and lines of blue ; very 

 minutely punctul ate ; intermediate valves narrow, subrectangular ; 

 lateral areas slightly distinct ; end valves delicately concentrically 

 striolate. Girdle ashy and rufous banded, scaly, the scales distinct, 

 subrotund, polished, shining. 



Length 10*, breadth 6 mill. (Kir.) 



Cape of Good Hope. 



The valves appear smooth to the naked eye, but under the lens 

 delicate, elevated points are visible upon the central areas ; and on 

 the slightly raised lateral areas and the end valves, there are very 

 delicate concentric striae. The head valve has 12, the posterior 

 valve 13 slits. The median valves are very narrow (5*2 mill, wide, 

 1*2 long), with one slit in the insertion-plates. The scales of the 

 girdle are as large as those of C. capensis Gray, shining, convex and 

 rounded. The color is very various : gray, blue-gray, yellowish and 

 reddish-yellow to brown shells occurring, but all show under a lens 

 sky-blue dots, which frequently coalesce into lines. The girdle has 

 darker transverse bands. (Krauss.) 



I. DORSUOSUS Haddon. PI. 25, figs. 11-19. 



Shell remarkably compressed laterally, the two sides meeting at 

 an angle of 75. Anterior valve concentrically rugose, with about 

 26 radiating low irregular ridges, some of which bifurcate. Central 

 areas, with jugum and anterior border striated, the pleura with dis- 

 tinct horizontal ridges. Lateral areas distinct, concentrically rugose, 



