ÖASTROPODA 



559 



Family 5. Fusidae Tryon. 



Shell turreted, fusiform or ovoid, generally loithout varices. Canal more or less 

 elongated. Inner lip smooth, or with weak columellar folds ; outer margin thin. Oper- 

 culum horny. Jura to Recent. 



These sliells are sparse in tlie Upper Jura and Cretaceous, but abundant in tlie 



Fig. 1026. 



Fususlongirostris Fio. 1027. Fio. 1028. 



Brocchi. Miocene ; Clavella longaevus ham. Sycumbulbiformis (Lanu), C&l- Fig. 1029. 



Baden, near Eocene ; Damery, near caire Grossier ; Grignon, near Fasdolaria tarbelliana Grat. 



Vieniia. Epernay. Paris. Miocene ; Grund, near Vienna. 



Tertiary and Recent. The animal difFers somewhat from that of the Buccinidae and 

 Muricidae. 



Fusus Lam. {Fusiniis Raf. ; Colus Humph.) (Fig. 1026). Shell narrow, elongate ; 

 spire acuminate. Aperture ovate ; canal very long, straight, open. Outer niargin 

 thin, sometimes crenulate, and often striate within ; columella smooth. Rare in 

 Upper Jura and Cretaceous, very profuse in Tertiary and Recent. 



Glavella Svvains. (Cyrtulus Hinds) (Fig. 1027). Thick-shelled, smooth or with 

 fine Spiral Striae. Body wliorl suddenly contracted anteriorly. Canal 

 very long, straight. Common in Eocene ; rare in Neocene and Recent. 



Sycum Bayle {Leiostoma Swains.) (Fig. 1028). Spire short ; 

 body wliorl inflated, smooth, somewhat flattened below the suture. 

 Inner lip smooth ; canal straight. Common in the Eocene ; rare 

 in Miocene. 



Fasdolaria Lam. (Fig. 1029). Like Fusus, but distinguished 

 in general by having a sliorter spire, more inflated body whorl, a 

 wider and more sinuous or flexuous canal, and in that the anterior 

 portion of the columella has two or three oblique plications. 

 Cretaceous to Recent. Fio. loso. 



Latirus Montf. (Fig. 1030). Shell fusiform, turreted ; spire Latirus craticulatus 

 Costa te. Aperture oblong, outer margiu relatively thin, crenulate; Lapngy.Transyivania.' 



