rusus. 131 



C. ligata is not columbelliform, and cannot be included in 

 Btrigatella on other grounds also. Its protoconch is truly 

 characteristic of Conomitra, and the shell is biconical as in typical 

 examples of that genus. The species is comparable with the 

 smooth Conomitra of the Paris Basin, as exemplified by 

 C. marginata, Lamarck. 



Bi mem ions. — Length 6-5 mm. ; breadth 3-5 mm. ; length of 

 aperture 35 ram. 



Form, mid Loc. — Eocene : Muddy Creek, Victoria. 



G. 9343. Three specimens. Purcliascd. 



Family FASCIOLAmiDJE. 



Genus FUSUS, Lamarck. 

 [Mem. Soc. Hist. Nat. Paris, 1799, p. 73.] 



Shell narrow, elongate, spire acuminate; aperture ovate; outer 

 margin thin, sometimes crenulate, and often striate within ; 

 columella smooth, typically with a detached border ; canal very 

 long, straight, and open. 



Type. — Murex colus, Linnaeus. 



Fusus hexagonalis, Tate. 



1888. Fusus hexagonalis, Tate, Trans. Roy. Soc. South Aust. vol. x. p. 139, 



pi. iii. figs, loa-b. 



1889. Zaiirofusus (?) hexagonalis, Cossmann, Ann. Geol. Univ. t. v. p. 1089. 

 1893. Fusus hexagonalis, Tate and Dennaut, Trans. Eoy. Soc. South Aust. 



vol. xvii. pt. 1, p. 219. 



Shell lanceolate, fusiform, prismatic. Professor Tate describes 

 the protoconch (Plate V. Figs, ba-h) as follows: "Apex of two 

 and a half whorls, medially angulated ; the anterior unicostate 

 and projecting beyond the succeeding whorl, the next narrower, 

 smooth, and ending in an upturned lateral point." Whorls from 

 six to seven in number, convex, deeply spirally sulcated, and 

 crossing the longitudinal costaj ; the latter are well elevated, 

 sliarp, and distantly spaced ; those on the body-whorl are ap- 

 proximately in line with those on preceding whorls, producing 

 a prismatic appearance, though this phenomenon is not so well 



