'^/;.7 



42 



Hab. ad oras Chilenses. (Valparaiso Bay.) 

 Found in coarse sand at low water. — G. B. S. 



Venus lenticularis. Ven. testd lenticulari-subtrapeziformi, 

 crassd, opacd, pallida, l<Evi, lineis concentricis antice posticeque 

 distinctis, medio obsoletis, prope umbonem elevatiusculis ; margine 

 dorsali subrotundato, postice subangulato ; impressione cordi/ormi 

 elongatd, parvd, impressd ; intHs albidd, margine ventrali lievi : 

 long. 3-1, lat. 1-5, alt. 2-7 poll. 



Hab. ad oras Chilenses. (Valparaiso Bay.) 



Found in coarse sand at low water. — G. B. S. 



Venus asperrima. Ven. testd obovatd, crassiusculd, opacd, albi- 



cante, radiatim costellatd, costellis numeronis, decussatis, asperis ; 



latere antico breviore ; margine postico dorsali declivi, rectiusculo ; 



impressione cordiformi untied elongatd: long 2', lat. 1', alt. l'G5 



poll. 

 Hab. ad Insulam Lobos dictam. 

 Found in fine sand at low water. — G. B. S. 



Venus costellata. Ven. testd obovatd, turgidd, fuscescente, cos- 

 tellis lamellosis, refiexis, postici magis eminentibus, concentricis 

 ornatd ; lineis radiantibus impressis albis decussatd ; impressione 

 cordiformi anticd distinctd, marginibus medianis elevatiusculis; 

 intils albd, margine ventrali crenulato ; long. 2' 6, lat. 1-5, alt. 

 2-3 poll. 



Hab. ad Valparaiso, Chilensium, et ad Callao, Peruviae. 



Obs. Testa nonnunquam unicolor, nonnunquam prope apices con- 

 cinn^ punctulata. 



Found in coarse sand at a depth of from six to fifteen fathoms. — 

 G.B. S. 



Venus opaca. Ven. testd oblongd, subquadratd, subturgidd, lavi, 

 opacd, albidd, pallidissimi purpurascente ; latere antico brhviore, 

 rotundato, concentrice ruguloso, postico subrotundato, suprd. in- 

 frdque subangulato ; margine interno integerrimo ; Ugamento per- 

 magno : long. 34, lat. 1'6, alt. 25 poll. 



Hab. ad oras Chilenses. (Conception and Maule.) 



Found in sandy mud at low water. — G. B. S. 



Venus variabilis. Ven. testd oblongo-subtrigond, tenuiusculd, leevi, 

 politd, albd, strigilis lineisve angularibus fuscis varie pictd ; int^s 

 albd, margine integerrimo : long. 13, lat. 07, alt. Tl poll. 



Hab. in Austraha. (Swan River.) — G. B. S. 



Venus discors. Ven. testd obovali, crassiusculd, radiatim confertim 

 striatd, antice rugis decussatd, albd fusco-nigricante instrata, co- 

 loribus valvce altera diversimodo ordinatis ; lined dorsali elevati- 

 usculd ; intus albd, postice violaceo tinctd, margine ventrali crenu- 

 lato : long. r9, lat. Tl, alt. l' 6 poll. 

 Hab. ad Sanctam Elenam, Americse Meridionalis, et adGuacomayo, 

 Americse Centralis. 



- The disparity in the arrangement of the colouring in the two valves 

 is a remarkable peculiarity in this species. 



Found in sandy mud at from six to nine fathoms. — G. B. S. 



