COXCHOLOny. 133 



Fiimili/ Astartidse. 



Foot conical, compressed. Hinge with sti-unp:ly developed cardiiuil teeth. 

 Pallial line entire or but slightly indented. Shell thick, often couceutrieally ribbed. 



CE.4SSATELL.4., Lamarclc. 



Sliell solid, eqnivalve, attenuated behind. Ligament internal. Teeth two 

 primary and one lateral in earh valve. 



* ,, K.UHATA, Sow. Andamans. 

 Caedita, Lamarclc. 



Shell cordato, ciiuivalve, inequilateral, radiately ribbed. Lateral teeth none. 



* ,, BicoLOE, Lam. 



* ,, PICA, Reeve. 



Family Veneridse. 

 Siphons short, uneq^ual. Foot large, linguiform, compressed. 



Suh-fumihj VENERIN-E. 



"Venus, Linnmus. 



Foot lanceolate, -w-ithout a byssal groove. Siphons divergent, the branchial, with 

 a double row of eirrhi ; the anal conical, crowned with short cirihi. Sludl tliick, 

 tumid, margin crenulated. Hinge with three teeth in each valve. Pallial einus 

 short. Animals bui-row in the sand and are collected for food. 



* ,, Chkmxitzu, Hanley. 



* ,, Aeakan'a, Hanley MS. 



* ,, COE, Reeve. 



This species is an estuarine form. 



,, AFFiNis, Sow. Andamans. 



,, alabastrum. Andamans. 



Cryptogramma Aeakana, G. and H. Nevill. 

 *CnioxE CocHixExsis, Sow. 



,, CErLONENSis, Sow. Iriawaddy Delta. 



* ,, Calophtlla, Hanley. 



* ,, EADiATA, Chem. 



* ,, THIAKA, Wood. 



* ,, NEBULOSA, Lam. 



,, pinguis, var. Chem. 

 *CrTnEUEA JiERETEix, Lam. 



* ,, iMPUDicA, Lam. 

 *Cailista ertcina, L. 



* ,, KtNGir, var. Nicobaeica (Sow. Thes.). 



*SlINETTA BURMAJTICA, Phil. 



* ,, SCEIPTA, L. 



* ,, picTA, Lam. 



* ,, ESCAVATA, Hanley. 

 *CrECE GiBBiA, Lam. 



* ,, SORIPTA, L. 



* ,, ^QurrocA, Sow. 



* ,, PLAcrxELLA, Lam. 



* ,, DiVAEicATA, them, (non Sow.). 



Sub-family DOSINIINiE. 

 Shell orbicular. Pallial sinus obli(|ue, deep, pointed. 



