FRESHWATER AND LAND SHELLS. 69 



Remarks This is the smallest of the Planorbes which has come 



under my notice, and may at once be distinguished by its lenticular 

 form. The specimens in my possession I owe to my brother, T. G. 

 Lea. They were first pointed out to him by Mr Buchanan. 



Note. — I would be glad to be permitted to mention here, that the Helicina pulcherrima 

 (Vol. V. page 49), and Helix purpuragula (Vol. V. page 51), supposed to be from Java, 

 really inhabit Cuba, having recently received some collected on the mountainous part of that 

 island. 



Recently, in examining with a lens a very perfect specimen of Carocolla spinosa (See Vol. 

 IV. page 104), I observed a remarkable character which had before escaped me. The supe- 

 rior part, in very perfect specimens, exhibits a crimped epidermis of a peculiar nature, being 

 very irregular in the sizes of the crimps. Beneath the epidermis the shell is striate. 



Continuation of Mr Lea's Paper. Bead, Jlugust I9th^ 1836. 



GENUS MARGARITA. 



Subgenus Unio. 



Unio GRANiFERus. Plate XIX. fig. 60. 



Testa nodulosa, subrotunda, injlata, ponderosa ; valvulis crassibus; natibus valdh proini- 

 nentibus ; epidermide atro-fusca ; dentibus cardinalibus grandibus ; lateralibus brevibus sub- 

 rectisque ; margarita colore cocao. 



Shell nodulous, subrotund, inflated, ponderous ; valves thick ; beaks very prominent ; 

 epidermis dark brown ; cardinal teeth large ; lateral teeth short and nearly straight ; 

 nacre chocolate-colour. 



Hab. Ohio River, near Cincinnati. T. G. Lea. 



My Cabinet. 

 Cabinet of T. G. Lea. 

 Cabinet of Mr Hyde. 



YL S ~ 



