41 



SPHiERA. 



Gen. Char. A globose, eared, bivalve ; with 

 one central and two? remote teeth about 

 the hinge. 



Ears obtuse, sliort, incurved ; the line of the hing-e is 

 long', slightly curved, and terminated at one, perhaps 

 at both ends, by a flat obscure tooth beneath the com- 

 mencement of the ear ; in the centre of it, is a large 

 irregular tooth, transversely flattened and turned to- 

 wards the incurved beak j the shell is thick and very gib- 

 bose. 



Of this newly discovered Genus only one species has 

 been found, and of that only one valve, therefore it is not 

 known whether it be equalvalved or not : neither has the 

 situation of the ligament, or impressions of the muscles 

 been ascertained, the shell is so strongly cemented to the 

 stone ; it is thought convenient, however, to publish it 

 for the purpose of inducing further research, and of sup- 

 plying Geologists with a name for it, as it is a fossil 

 characteristic of a stratvira where shells are rare. 



