1853.] 269 



Theliderma, Hiffains. 

 This embraces all the tuberculated species, as U. Phillipsea, fragosus, nobilis, 

 quadrulus, apiculatus, &c. The animal appears to agree with that of the my- 

 tiloid species, as U. ruber, coccineus, obliquus, cordatus, &c. 



Lampsilis, Kaf. 

 This includes U. ochraceus, ovatus, cardium, capax, dolabraeformis, &c. 



EURINEA, Kaf. 



This includes U. nasutus, rectus, productus, Jayensis, lanceolatus, &c- 



Proposed New Genera. 

 CucuMARiA, Ccn. Australia, 



Shell elongated, plicate ; cardinal teeth robust, little prominent, obtuse, 

 slightly lobed, transversely sulcated ; lateral teeth compressed, not prominent? 

 third anterior muscular impression profound, not confluent, situated immediately 

 under, and near the extremity of the cardinal teeth. 



U". cucumoides, Lea. 



Hyeiopsis, Con. Asia. 



Shell elongated, posteriorly winged ; cardinal teeth elongated, very oblique, 

 not prominent, and marked with transverse granulated lines; lateral teeth gra- 

 nulated on the margins ; third anterior muscular impression large, not confluent, 

 situated remote from the extremity of the cardinal teeth ; anterior accessory 

 muscular impression rather small and more distant from the large impression 

 than in any other sub-genus. 



We know only one species, JJ. delphinus^ Gruner. 



MONODONTINA, Con. 



Hinge with an obtuse rounded tooth immediately under the beak. 

 Margaritana Yondenhuschiana^ Lea. (ilf. Busclilanay Con.) 



CORRIGENDA. 



U. angustatus, Lm, 1832, vi. &c. 



U. capax. Green, (Symphynota globosa,) iea, 1834, v. 41, &c. 



U. capsaeformis. Lea, 1834, v. 31, &c. 



U. metanever, read U. metaneurus. 



The Committee on Major Le Conte's paper on the Vines of North 

 America, reported in favor of publication in the ProceediDgs. 



An emimeration of the Vines of North America. 

 By John Le Conte, F. L. S. 



In attempting to give some account of the vines of our country, a very con- 

 siderable difficulty arises, even at the outset, from the great similarity of the 

 diff"erent species. A family resemblance almost amounting to identity runs 

 through the whole of them. Hence, characters which are taken as distinctive, 

 may appear too slight to warrant us in separating as distinct species what at 

 first sight might appear to be mere varieties. But setting aside the shape and 

 appearance of the leaves, the nature of the fruit and the method of its growth, 

 in most cases, furnish a good criterion for distinguishing closely allied species 

 from each other, which might in vain be sought for elsewhere. 



Some years ago, when there existed a mania for the cultivation of the vine, 



