43 



Venus Cyphia. Ven. testd oblongd, subtrigond, concentrici lamellosd, 

 lamellis crassis, obtusis, postice tenuioribus, subappressis, albd 

 fusco radiatd ; lined dorsali rectiusculd, declivi ; ared posticd latd, 

 fuscatd ; impressione cordiformi anticd conspicud, fuscd ; margine 

 ventrali intūs integerrimo : long. 0"75, lat. 0*4, alt. O' 6 poli. 



Hab. ad Insulam Platse, ColumbijE Occidentalis. 



Found among coral sand in seventeen fathoms. 



This appears to be a near relation to the Linnean Venus Paphia. — 

 G. B. S. 



Venus crenifera. Ven. testd ellipticd, asperd, albicante fusco 

 maculatd et varie pictd, lamellis concentricis, brevibus, confertis, 

 striis radiantibus confertissimis decussatis; margine ventrali crenu- 

 lato ; dente cardinali antico magno, elongato : long. 1'4, lat. 08, 

 alt. 1-2 poli. 



Hab. ad Sanctam Elenam. 



Variat testd subfuscd, unicolore, striis radiantibus nonnullis elevatis 

 costiformibus. 



Hab. ad Paytam, Peruvise. 



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



Venus leucodon. Ven. testd ellipticd, cinerascente, crassiusculd, 

 concentrice costellatd, costellis Icevibus, reflexis, radiatim striatd, 

 striis numerosis, confertis: ared dorsali posticd lunuldque fuscis ; 

 margine interno ventrali denticulato, denticulis albis, interstitiis 

 nigricantibus : long. 1'35, lat. 0'7, alt. 1"15 poli. 



Hab. in Sinu Califomiensi. (Guaymas.) 



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



Venus Californiensis. Ven. testd globosd, crassd, albente, concen- 

 trici multi-lamellosd, lamellis crassiusculis lateralitersubcrenulatis, 

 costis creberrimis cancellatd ; ared posticd infossd, grandi ; lunuld 

 magnd, tumente ; intiis albd, impressionibus muscularibus posticis 

 violaceo fucatis ; limbo, interno crenato : long. 2*9, lat. 1"7, alt. 

 2-7 poli. 

 Hab. in sinu Califomiae. (Guaymas.) 



From about the middle of the valve the concentric lamellee begin 

 to approach nearer and nearer, till, in old specimens, they hide the 

 radiated ribs, and at length, at the ventral border which is covered 

 with an epidermis, they become mere smooth lineations. The intemal 

 violaceous spots are not always on the posterior muscular impressions, 

 but sometimes only in their immediate neighbourhood. 

 Found in sandy mud at low water. — W. J. B. 



Venus compta. Ven. testd subtrigond, planiusculd, crassd, la- 

 mellis concentricis lateraliter crenulatis, crassiusculis, radiatim 

 creberrime costellatd, albente lineis flavo-castaneis inscriptd ; ared 

 posticd incisd, spadiceo strigatd ; lunuld pallidiore ; intiis albd, 

 limbo crenato: long. 2'3, lat. 1"2, alt. 2- poli. 



Hab. ad Peixiviam. (Bay of Sechura.) 



A fine species. It -vvas dredged up in coarse sand and mud at a 

 depth of seven fathoms. — W. J. B. 



