LATIEOFUSUS. '135 



and towards the middle by two or three prominent ones, crossed 

 by growth-lines which are raised into minute scales on the larger 

 lira?; bases of serrations with rounded ridges, conformable with 

 their curvature. Base of body-whorl encircled by a slender keel, 

 which is coincident with the posterior angle of the aperture ; the 

 whole surface roughly cancellated by numerous unequal spiral 

 threads and lamellae of growth ; beak encircled with spiral threads 

 and two or three ridges carrying vaulted scales." The aperture 

 is pyriform, opening widely anteriorly and angulate at the outer 

 margin ; columella slightly twisted ; anterior canal long, open. 



As mentioned on p. 54, this species bears considerable external 

 resemblance to certain forms of Columbarhm, and it would have 

 been included in that genus only that the protoconch is different 

 and more nearly resembles that of a Fums. Further, the aperture 

 is more open and the columella is not covered in the same manner. 

 The species is by no means a typical Fusus, as exemplified, for 

 instance, by F. colon. For further observations on its systematic 

 position see ante, p. 54. 



Dimensions. — 'Lengt]x 44 mm.; breadth 16 mm.; length of 

 aperture 9 mm. ; length of canal 21 mm. 

 Form, and Loc. — Eocene : Victoria. 



48052. Several examples illustrating stages of growth ; from 



Schnapper Point. Purchased. 



G. 4284. Specimens with spire very much elongated; from 



Muddy Creek. Presented hy John Lennant, Fsq. 



Gr. 4747. An example of the adult; from Muddy Creek. 



Presented by Professor T. Rupert Jones, F.R.S. 

 G. 5522. Two specimens of the adult ; from Muddy Creek. 



Purchased. 



Genus LATIROFUSUS, Cossmann. 

 [Ann. Soc. Roy. Make. Belg. t. xxiv. 1889, p. 175.] 



Shell very narrow ; protoconch smooth and globose, ornamented 

 by spiral striae and small longitudinal ribs; aperture small and 

 rounded; anterior canal long, straight, almost closed, the external 

 aspect merely presenting a narrow slit; columellar border often 

 detached and having one or two oblique plications anteriorly. 



In general configuration Latirofusus is not unlike Fusus, but 



