144 



GENERA AND SPECIES. 



Venus. (YEN BRIDGE.} Plate ix. 



114. exoleta, . 2 in.^x 2 in. 



115. lincta, i| in. x i| in. 



116. chione, 3 in. x 2f in. 



117. fasciata, ^ in. x fin. 



118. casina, if in. x if in. 



119. verrucosa,2in. x i? in. 



121. gallina, ij in. x i^ in. 



120. ovala, 



n. x 



n. 



inside margin plain, colour yellowish white, 

 rayed with white and pink, inside polished 

 and freckled, with or without a purple stain. 



inside margin plain ; colour white, with 



yellow, brown, and pink ; inside chalky 



white. 



inside margin plain, colour rich pinkish 



brown with rays of darker brown, inside 



chalky white. 



inside margin notched except on the posterior 

 side, colour pinkish with pink rays, ribs 

 concentric and flat, margins angled. 



inside margin notched except on the posterior 

 side, ridged with concentric plates, colour 

 yellowish white with or without brown rays, 

 margins rounded. 



inside margin notched except on the posterior 

 side, coarsely ribbed concentrically, colour 

 yellowish brown with brown rays, mouth 

 white, inside white, margins rounded. 



inside margin notched except on the posterior 

 side, finely striated concentrically, colour 

 pale brown with darker rays, margins 

 obliquely rounded. 



inside margin notched all round. 



Vertigo. (PUPIDM.) Plate xx. 



Shell sinistral 



293. angustior, ^ g in. teeth 4 or 5, mouth triangular. 



299. pusilla, ^ in. teeth 6 or 7, mouth square. 



Shell dextral 

 No teeth 



295. edentula, ^ in. faintly striated. 



297. minutissima, ^ in. distinctly striated. 



Teeth 4 or 5 

 With rib- 



296. hlljcborgii, ^ in. rib thin. 



298. motilinsiana, ^ in. rib very stout, umbilicus open. 



300. pygmaa, 



292. alpestris, 



301. substriata, 



302. tumida, 

 294. antivertigo, 



^ in. rib very stout, umbilicus narrow. 

 Without rib 



^ in. suture very deep. 

 Teeth 6 



^ in. yellowish horn-coloured, suture very deep, 

 mouth semi-oval. 



^ in. mouth heart-shaped. 

 ^ in. mouth triangular. 



