Notes on Species of the Family Corbiculadce. 417 



51. Corbiciila consanguiBiea, nov. spec. 



C testa ovato-transversa, compressiuscula, aequilaterali ; epider- 

 mide viridescente, nitente vestita ; regulariter striata ; urabouibus 

 brevibus, atro-violascentibus ; valvis intus violaceis ; cardiue lato. 



Long. 16 ; lat. 14 ; diam. 9 mill. 



Hah. — India. 



Very closely allied to Corb. striatella (page 74, fig. 22) ; the 

 lateral teeth in Corb. consanguinea are stronger and much 

 broader than in Corb. striatellcc. 



52. Corbicula PfeifFeriana., nov. spec. 

 C. testa covdiformi, subaequilaterali, epidermide flavescente ves- 

 tita ; sulcis distantibus, umbouibus tumidis, incurvis, approximatis ; 

 cardine lato. 



Long. 15 ; lat. 14 ; diam. 10 mill. 

 Hab. — China. 



Genus CYRENA. 



io. Cyrena exquisita, nov. spec. 

 C. testa subquadrangulari, compressiuscula ; epidermide oliva- 

 ceo-fuscescente vestita ; striis regularissimis, approximatis ; umboui- 

 bus acutis, brevibus ; valvis iutus purpureis ; sinu pallii profunde 

 intrante. 



Long. 24 ; lat. 22 ; diam. 12 mill. 

 Hah. — In flumine Chepo prope Panama, Novce Granadas. 



11. Cyrena germana, nov. spec. 



C. testa orbiculato-trigona, subaequilaterali, compressiuscula; 

 epidermide olivaceo-lutescente vestita ; striis regularibus ; umboni- 

 bus brevibus, incurvis ; valvis intus violaceis ; sinu pallii profunde 

 intrante. 



Long. 43 ; lat. 38 ; diam. 24 mill. 



Hob. — In flumine Fanaco prope Tampico, Mexico. 



