BIVALVE SHELLS. iJOl 



Cyprina islandica, Flem. Brit. Anim. p. 443. no. 510. 

 Cyprina vulgaris, Sow. Gen. of Shells, f. 1,2. 



Fossilis. 



Nyst, Coq. Foss. Belg. p. 147. no. 101. pl. 9. f. 1. 

 Venus aequalis, Sow. Min. Conch. pl. 21. 

 Cyprina aequalis, Phil. Enum. Moll. Sicil. i. 39. 



Agass. Coq. Tert. p. 52. no. 2. pl. 13. f. 5. 

 Cyprina maxima, Wood, Cat. Foss. Shells from the Crug, Ann. 



Nat. Hist. vi. 249. 

 Cyprina angulata, Nyst, Rech. sur les Foss. Anv. p. 9. no. 34. 

 Cyprina Islandicoides, Nyst, loc. cit. p. 9. no. 33. 

 Cyprina islandica, Hisinger, Leth. Suec. Suppl. 2. p. 9, 



Phil. Enum. Moll. Sicil. ii. 31. 



Russell, Essex Journ. i. 3/. 



De Kay, Zool. of New York, v. 215. 

 Cyprina vulgaris, Morris, Cat. Brit. Foss. p. 86. 



Hab. Oceanus Europseus. 



Fam. 3. Glauconomidae. 



Animal oblongum, transversum ; pallium antice inferneque 

 apertum, postice clausum et tracheis binis basi conniventibus, 

 praelongis, lateraliter compressis terminatum ; pes minimus, com- 

 pressus, oblongus, linguiformis ; appendices labiales latee, trian- 

 arulares, oblon^rse, membranaceae ; branchife elono-atfE, oblonsee, 

 postice conjunctae. — Gray, Spic. Zool. 1826. 



Testa oblongo-ovalis, tenuis, ventricosa, sequivalvis, inaequi- 

 lateralis, antice rotundata, postice subacuminata, epidermide 

 viridi, tenui, cornea induta ; cardo angustus ; dentibus in utra- 

 que valva tribus, posticis majoribus, valvae dextrse medio sinistrae 

 postico bifidis ; impressiones musculares duse, antica oblonga, 

 marginali, postica subquadrata ; impressio pallii sinu angustis- 

 simo, profundo terminata ; ligaraentum externum, oblongum. 



Glauconomida?, Gray, Ann. 8f Mag. Nat. Hist. 1853. 



Solenicurtes, pt., Swains. Malac. 366 (1840). 



Solenacea, pt., Reeve, Conch. Syst. i. 48. 



Cyclades, pt., Potiez Sf Mich. Gall. de Douai, ii. 193 (1844). 



Solen, sp., Linn. 



Solenidse, pt., Hanley, III. Cat. i. 11 (1844). 



This family differs frora Veneridce in the forra and disposition 

 of the cardinal teeth, the union of the raantle lobes, in the fresli- 

 Mater habitation, and in being covered with a hard green peri- 

 ostraca, which from its external appearance seeras evidentlv to 



9** 



