VENERUPIS.— Plate I. 



The crenated Venerhpis. Shell oblong-subqiiadrate, 

 posteriorly obliquely angular, clouded with orange 

 and purple; radiately striated, concentrically 

 exfoliated, witli outstanding crenulated lamina, 

 broader posteriorly; anterior side short, umboes 

 tumid, nearly terminal; posterior side elongated, 

 with rectangular margin. 



Lamarck. Anim. sans Vert. 



Hah. New Holland. 



A beautiful shell, highly characteristic of the genus. 



Species 4. (Mus. Brit.) 



Venerhpis mirabilis. Ven. testa ohlongo-mhqumh-atd, 

 valde inflatd, omnino striis awjulatiin divaricatis 

 minutissime sculptA ; latere antico brevi, rotunda ; 

 umhonibus inf,atis; latere postico producto, olituse 

 angulaio. 



The admirable Venerupis. Shell oblong-subquadrate, 

 much inflated, very minutely sculptured in every 

 part with angularly diverging striie ; anterior side 

 short, rounded ; umboes inflated ; posterior side 

 produced, obtusely angular. 



Deshayes. Proc. Zool. Soc, 1853. 



Hob. Monterey, California. 



The curious zigzag structure of the surface is similar 

 to tliat of Venerupis tcxta, but it is very much more 

 minute. 



Species 5. (Mus. Sowerby.) 



Venerupis carditoides. Ven. testa pallida, ohlongd, 

 concentnce laminis extanlibus, subcrenatis, distan- 

 tibus, postice latioribus exfoliatd, sulcis subdistan- 

 tibm, inequalibus, angulatis radiaid; latere antico 

 brevi, umbonibus depressis ; latere postico oblongo, 

 cuneato, oblique angulato, margine terniinali sub- 

 oblique truncato. 



The cardita-like Venerupis. Shell pale, oblong, 

 concentrically exfoliated with outstanding slightly 

 crenated distant lamina, wider posteriorly, rayed 

 with rather distant unequal, angular sulci ; anterior 

 side short, umboes depressed ; posterior side 

 oblong, cornered, obliquely angular, termin:d 

 margin rather obliquely truncated. 



Lamarck. Anim. sans Vert. 



Hab. New Holland. 



The distance of the ribs or sulci from each other 

 varies in different specimens and in different parts of 

 the same shell, but there are generally a few broader 

 ones a little in front of the posterior oblique angle. 



