FAMILY 7. NYMPH ACEA. 81 



Examples. 



PL LVII. Fig. 1 to 3. 



Corbis fimbriata, Cuvier, Regne Animal, vol. ii. p. 481. Enc. Meth., 



pi. 286. f. 3. 

 Venus fimbriata, Linnaeus. 



PI. LVIII. Fig. 4 to 6. 

 Corbis Soverbii, Nobis*, Proceedings Zool. Soc. 1841. 



LUCINA, Bruguiere. 



Testa suborbicularis, aequivalvis, inaequilateralis, subdepressa, umboni- 

 bus parvis, acutis, obliquis. Cardo variabilis, modo dentibus duo- 

 bus divaricatis, modo edentulus. Dentes laterales in altera valva 

 utrinque unus ; in altera duo, interdum obsoleti, anticus ad car- 

 dinem propius admotus. Irapressiones musculares distantes ; an- 

 tica in fasciam interdum praelongam producta. Impressio muscu- 

 laris pallii simplex, distinctissime imbuta. 



Tbe genus Lucina of Bruguiere comprehends a natural assemblage of 

 species, selected from the Tellince and Veneres of Linnaeus ; their shells 

 exhibit a peculiar similarity of form, but are remarkable for the variety 

 of character displayed on the surface of the interior. The hinge varies 

 considerably ; in fact, the teeth are so irregular in their development, 

 that they are of little value in drawing up a generic description. 



The shell of Lucina is generally of an orbicular form, equivalve, in- 

 equilateral, and somewhat depressed, with the umbones small, acute and 



* We have had much pleasure in dedicating this beautiful species to Mr. G. B. Sowerby, 

 Jun., author of the ' Conchological Manual,' and engraver of many of the best plates of this 

 work. Our figures of the shell, viewed in the adult and young state, are drawn from two 

 magnificent specimens in the possession of the Rev. Mr. Stainforth. 

 VOL. I, M 



