106 AMERICAN JOURNAL 



Buddii, Say.* proxima, Say. 



circincta, Lea. Schiedeana Phil. 



exilis, Hald. silicula, Gld. 



multilineata, Say. striata, Lea. 



ohruta, Lea. Troostiana, Lea. 



occatii Hinds. Virginica, Say. 

 proteus, Lea. 



" Genus Gyrotoma, Shuttlewortli, (i. 305.) 



Shell ovate, tarreted; wliorls transversely sulcate ; aperture 

 oblong ; inner lip thickened, with a posterior callosity ; outer 

 lip thin, with a deep, narrow, posterior fisure. 



Syn. Schizostoma, Lea, not Bronn, Melatoma, Anthony, 

 not Swainson, Schizocheilas, Lea. 



Ex. G. ovoidea, Shuttleworth, t. 82. f. 4, a, h. 



The fissure in the outer lip is wanting or obsolete in the 

 subgenus Megara, the species of which in other respects 

 closely resemble those of Gijrotoma proper. Both groups are 

 American in their geographical distribution. 



altilis, Anthony. excisa, Lea. 



Babylomca, Lea. Foremani, Lea. 



Buddii, Lea. funiculata, Lea. 



conica, Say. incisa, Lea. 



co7istricta, Lea, laciniata, Lea. 



curta, Migh.? ovoidea^ Shuttl. 



cnrvata, Say. pagoda, Lea. 



cyh'ndracea, Migh. ? pyramidaia, Shuttl.f 



" Subgenus Megaea, H. & A. Adams, (i. p. 306.) 



Shell ovate, solid; whorls transversely sulcate; aperture 

 ovate-oblong, subcanaliculated anteriorly ; outer lip thin, 

 simple, acute. 



alveare, Conr. Soeydei, Lea. 



arctata, Lea. impressa, Lea. 



auriculse/ormis, Lea. lateralis, Lea, 



basaliSf Lea. lima, Conr. 



hrevis, Lea. oliva, Lea. 



crehristriata, Lea, olivulf, Conr. 



harpa, Lea. ova lis, Lea. 



JSaysiana, Lea. pumila, Lea. 



* Should read Buddii, Lea. M. exilis, Hald., aud proximo. Say, certainly 

 do not belong here. I have already remarked upon M. Virginica and 

 7nuUili)ieati. 



t Mr. Anthony never described Gyrotoma altilis, ranked among these 

 species. G. conica, Say, is the young of Pleurocera canaliculnta. There 

 are, besides, frequent mistakes in all these lists,in misquoting authorities. — T. 



