CLASS IV 



GASTROPODA 



Dot 



Family 5. Fusidae Tryon. 



Shell hirreted, fusiform or ovoid, generally without varices. Canal more or less 

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

 culum horny. Jura to Recent. 



These shells are sparse in the Upper Jnra and Cretaceous, but abundant in the 



Fio. 102(5. 



Fusus lonrjirostris 

 Brocchi. Miocene ; 

 15 a lie 11, near 

 Vienna. 



Fig. 1027 



Pig. 1028. 



ClaveUa longiKims Lam. Siic.uinhulbiform,is{LiS.\n.). Cal- 

 Eocene ; Daniery, near caire Grossier ; Grignon, near 

 Epernay. Paris. 



Fio. 1029. 



Fasciolaria tarhdViaiia Grat. 

 Miocene ; Grund, near Vienna. 



The animal differs somewhat from that of the Buccinidae and 



Tertiary and Recent, 

 Muricidae. 



Fusus Lain. (Fusinus Raf. ; Colus Humph.) (Fig. 1026). Shell narrow, elongate; 

 spire acuminate. Aperture ovate ; canal very long, straight, oiien. Outer margin 

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

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



ClaveUa Swains. {Cyrtulus Hinds) (Fig. 1027). Thick-shelled, smooth or with 

 fine spiral striae. Body whorl suddenly contracted anteriorly. Canal 

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



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

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

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

 in Miocene. 



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

 in general ))y having a shorter 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. 



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

 costate. Aperture oblong, outer margin relatively thin, crenulate ; Lapugy j Transylvania! 



Pio. 1030. 



Latirus craticulatus 

 (d'Orb.). Miocene; 



