100 1-' IIN< III 1 



Var. jiuni'tn/'ttu. Shell carinated. ashen-wbitisb, unicolored or 



> d and dotted with brown ; very finely punctate. Lateral 

 areas and end valves radially striated. Length *2'2, breadth 10 

 mill. Tin- valves are keeled and covered with regularly arranged 



..:-d points only to he seen under a lens. 



A- an illustration of tins variety Kranss refers to Sowerby's 

 Gout-hoi. Illn.-tr. fig. ">"), but in my opinion this i- not correct. 



I. OKI8CU8 Krauss. PI. 20, figs. 12, 3, 14, 1 "). 



Shell small, ovate-oblong, tbin, semipellncid, subcarinatod ; white, 

 rarely with a reddi-h dor.-al baml, or yellowish with green dots. 



Intermediate valves having the central areas very finely punctu- 

 late in tbe middle and longitudinally striolate at the sides; lateral 

 areas and end valves finely undulately striolate. (iirdle yellowish, 

 mandated with L r reen, scaly, the scales very minute, oblong, smooth. 

 (Kraws.} Length 10, width 5'6 mill. 



Natal, on the shore. 



Chiton oni'tcus KR., Die Siidafric. Moll. p. 39, t. 3, f. 4.Tschno- 

 chiton oniscus CPR., MS. 



This species, whilst it has a superficial resemblance to /. text His 

 <iray, is readily distinguished under the lens by the smaller and 

 smooth scales and by the smaller number of slits. The valves as 

 well as the girdle appear smooth to the naked eye, but the lateral 

 areas are visible. Under the lens the central areas are very tinelv 

 punctate on the dorsum, and on the pleura they are longitudinally 

 striated ; these stria3 continue upon the lateral areas becoming wavy 

 there. Tin- end valves have feeble wavy stria? toward the 

 margins, and have 10 slits in their insertion plates. The intenne- 

 diat- valve- are strongly convex, ~> mill, wide, 4 lon^r, rounded at 

 both .-ides, and having a single slit in each insertion plate. One 

 specimen is white with greenish-brown girdle ; another is whitish 

 with a rod-brown hand along the back ; a third specimen is dirty 

 yellow with green dots, the girdle also green dotted. (Kru< 



( arpenter gives this note on specimens received by him from 

 Stimp-nii : Terminal valves having 10- PJ, central 1 slit: teeth 

 acute ; eaves short, spongy ; sinus broad, Hat. In one of the .-pen- 

 men- examined the hind valve has the central teeth very small and 

 close, while the side teeth are long and distant. 



