VENERUPIS.— Plate II. 



liatd intus Jlavidd prope marginem nthro-violaced ; 

 latere antico brevissimo, umbonibus deprcssis ; latere 

 postico angulatim expanso, margine dorsali elevato, 

 suharcvato^ margine terminali late truncato ; 

 margine ventrali convexo, intus creiiato. 



The leafy Venerupis. Shell ovate-suborbicular, 

 ratlier compressed, rayed with duplicate, rather 

 distant grooves; exfoliated with distant, crenulated, 

 outstanding thin broad lamince forming an angle, 

 posteriorly, yellowish within, reddish-violet near 

 the margins ; anterior side very short ; umboes 

 depressed ; posterior side angularly expanded ; 

 dorsal margin raised, a little arched, terminal 

 margin broadly truncated ; ventral margin convex ; 

 crenated within. 



Deshates. Proc. Zool. Soc, 1853. 



/fab. Mazatlan. 



It may be a question whether this beautifully orna- 

 mental shell should not have been included in the 

 genus Venus. 



Species 11. (Mus. Hanley.) 



ViiNERnpis EXOTICA. Veil, testd oblongd, sxibrectan- 



guld, alhidd, lineis nihris posiice pictd ; radiatim 



distanter, acute sulcata; laminis crenatis, subdis- 



tantibus, extaniibus, posiice laiiorihvs, angulatis, 



exfoliatd ; latere antico breviusculo ; latere postico 

 oblongo, margine terminali recto. 



The EXOTIC Venerupis. Shell oblong, rather rectan- 

 gular, whitish, painted with red lines posteriorly ; 

 radiately, distinctly, sharply grooved ; exfoliated 

 with rather distant, outstanding crenated lamina, 

 wider and angular posteriorly ; anterior side 

 rather short; posterior side oblong, terminal 

 margin straight. 



Hanley. Wood's Index TestaceoL 



Ilab. New Holland. 



Species 12. (Fig. a, b, c, Mus. Brit.) 



Venerupis cylindracea. Vcn. testd irregulnri, hecigata, 

 subci/lindricd, co7icentrice sii-iatd, posticc aiigiilatd, 

 prodiictd, ad terminum iruncatd. 



The cylindrical Venerupis. Shell irregular, smooth, 

 subeylindrical, concentrically striated, posteriorly 

 angular, produced, truncated at the end. 



Deshayes (Petricola). Revue Zoologique. 



Petricola californica, Conrad. 



Petricola arciiata, Deshayes. 



Petricola sitbglobosa, Sowerby. 



Eab. California. 



