142 BUCCINID^. 



LiROFUsus, Conr. 

 Bistr. — L.thoracicus, Conr. = ducussatus,'Le& (li,56). Eocene; 

 Alabama. 



Genus not characterized. 



Strepsidura, Swainson. 



Distr. — S. costata, Swainson = Fusus Jiculneus, Lam. (li, St). 



Widely fusiform ; basal portion of the pillar turned outwardlj^, 

 with a sharp fold at the base of the aperture ; shell costate and 

 subcarinate, body-whorl ventricose. 



ToRTiFUSUs, Conrad. 



Syn. — Meganema, Conr. 



Distr. — T. curvirostra, Conr. (li, 60). Miocene; N. Carolina. 



Differs from Busycon in being without a trace of tubercles or 

 spines, and in having prominent regular ribs ; the whorls are 

 flattened on top, and slightly canaliculated. 



Pyropsis, Conrad. 



Distr. — P. perlata, Conr. (li, 61). Cretaceous; Tippah Co., 

 Miss. 



Spire very short, apex not papillated ; labrvim without strise 

 within, thick ; columella without a fold. 



Clavifusus, Conrad. 

 Distr. — G. Coope?'*, Conrad (li, 62). Eocene; Alabama. 

 The genus has not been characterized. 



Subfamily PISANIINM. 



PisANiA, Bivona. 



Syn. — Pusio, Gray. 

 ' Distr. — 20 sp. West Indies, Mediterranean, Bed Sea, Philip- 

 pines, Australia, Polynesia. P. pusio, Linn. (1, 22). 



Shell oblong ; spire prominent, whorls smooth or spirally 

 striated ; canal very short ; outer lip thickened and crenated. 

 Operculum ovate, nucleus apical. 



Between typical specimens of this genus and of Euthria "there 

 is a distinction with a difference," and therefore it may be profit- 

 able to retain both groups ; but there are species in which the 

 characters become so merged that their generic classification is 

 merely arbitrary. 



Euthria, Gray. 



Syn. — Evarne, H. and A. Adams. 



Distr — 10 sp. Mediterranean, Cape, N. Zealand, Cape Horn, 

 Chili, California, Alaska, Japan. U. cornea, Linn. (1, 23). 



Shell fusiform, smooth ; aperture oval, produced anteriorly 



