GLAUCONOME. 



broad, elongate, oblique, rather tbiok. Gill elongated, 

 " oblong, very Ibin, united together behind the end of the 

 body.'' 



Shell oblong-oval, thin, rather ventricose, equivalve, 

 inequilateral, niargins close, anterior end rounded, poste- 

 rior somevrhat acuminated, covered with a green, horny 

 and thin epidermis, which is inflected ov?r the margin all 

 round; hinge teeth in each valve three, the posterior 

 larger, the middle tooth of the right valve and posterior of 

 the left bifid ; no lateral teeth ; muscular impressions two 

 in each valve, the anterior marginal, oblong, the posterior 

 subquadrate ; pallial impression with a large, broad and 

 deep oblong sinus, obtuse at the anterior extremity; 

 ligament external, oblong. 



Only one species of this Genus is known, which 

 Mr. Gray has named Glauconome Chinensis. 



