(i4 BJVALyeS.^-MVTlLUS. 



Tlie Indian, Atlantic, Ainerican, and Northeni cceaiis, 

 produce many species; some are also from New Zealand^ 

 the Red Sea, Mediterranean, and Russian seas. 



The Mytili from the rivers in Africa, are often of great 

 beauty when polished, and exhibit tine colors. 



UYTILVS. -'3Iusde. 



A. Parasitical, affixed hy claws. 



Criftta-galli {CocKs-comb Oyster) Hyotis {Gt.Jinc/tr M.) 



Frons. 



B. Flat, or compressed: sliylithj eared, 

 Margaritiferus ( Mother of Pearl M.) Unguis. 



C Ventricose or convex. 

 Lithophagus( jBMrro?t7/«Y/3J. ) A ter. 



Rugosus. *Discors. 



Bilocularis. Hirundo [Swallow M.) 



Exustus. Pholadis. 



Brirbatus. Striatidus {Cross Beak M.} 



*£dulis. Vulgaris. 



*Incurvatus. PHcatus. 



Pellucidus. Niveus. 



*Umbilicatu*. Afer. 



*Curtus. Smaragdinus. 



Ungulatus Versicolor. 



Bidens {Furrow-cap 31.) Coralliophagus. 



* Modiolus {Smooth M.) Lineatus. 



*Cygneus. Faba {Bean JM,) 



*Anatinus. Fluviatilis. 



Viridis. Fuscus. 



Ruber. Mammarius. 



Albus. Pcrsicuj, 



