104 BUCCINID^. 



Genus PERISSOLAX, Gabb. Spire depressed ; body-whorl patulous ; 

 canal long ; columella without folds or plaits. 



Distinguished from Pn-pillina by the want of a columcllar fold, and 

 evidently intended to be ranged in the Fusinae, but I think its general 

 appearance decidedly that of Bn^i/con or TucUda. Cretaceous— Eocene. 



P. BREViBOSTRis, Gabb. PI. 30, lig. 67. Cretaceous, California. 



LetifxSHS, Conrad, is generally considered synonymous with Pcrissolax. 

 It is an uucharacterized Eocene form, of which I figure an example : 



L. (Perissolax) trabeatus, Conr. PI. 30, fig. G9. Eocene, Alabama. 



Genus TORTIFUSUS, Conrad. Differs from Bnsi/con hi being without 

 a trace of tubercles or spines, and in having iirominent regular ribs ; the 

 whorls are flattened on top, and slightly canaliculated. 



T.curvirostra, Conr. PI. 30, fig. 69. Miocene, If. Carolina. 



Genus PYROPSIS, Conrad. Spire veiy short, apex not papillated ; 

 labrum without striae within, thick ; columella without a fold. 



P. PERLATA, Conrad. PI. 30, fig. 70. Cretaceous, Tippah Co. Miss. 

 Genus CLAVIFUSUS, Conrad. The genus has not been characterized. 

 C. CooPERi, Conrad. PI. 30, fig. 71. Eocene, Alabama. 

 C. ALTiLis, Conrad. PI. 30, fig. 72. Eocene, Alabama. 



Sub-Family PISANIIN^. 



Subgenus Cantharulus, Meek. (S. G. of Cantharus). Shell with 

 canal moderately produced, rather narrow and twisted ; inner lip smooth 

 throughout, and rather well developed ; columella arcuate and twisted, so 

 as to form an obtuse, vmdefincd prominence below ; outer lip slightly 

 sinuous above. 



C. Vaughani, Meek and Hayden. PI. 31, fig. 73. Cretaceous, Uppieo' 

 Missouri River. 



Genus METULELLA, Gabb. Shell fusiform, canal more or less pro- 

 duced; inner lip covered with a thickened plate, continuous posteriorly 

 with the outer lip. Interior of botli inner and outer lips strongly denticu- 

 lated or transversely striated. Surface cancellatc or costate. More dis- 

 tinctly fusiform than Metula, the columella with a row of denticles. 



M. pusiFORMis, Gabb. PI. 31, fig. 74. Miocene, San Domingo, W. I. 



Genus LEVIBUCCINU]\I, Conrad. Not characterized. 



L. PRORSUM, Conr. PI. JJS, fig. 412. Eocene, Alabama. 



Genus AGASOMA, Gablj. Subfusiform, spire low, body-wliorl long ; 

 canal moderately j)roduced and slightly deflected ; ai>erture elongate, 

 labrum simple; labium incrusted with a tliin, smootli plate; suture bordered 

 by an elevated portion of the .succeeding whorl as in Clavdla. It differs 



