334 Proceedings of the Royal Society of Victoria. 



Locality. — Lower beds of Spring Creek series or Bird Rock 

 Bluff, near Geelong. — Jan Jukian. — Eocene. 



Observations. — The most striking features to distinguish this 

 form from the foregoing are in the umbilical characters, which 

 do not admit of any hesitation, in making the separation. 



Bankivia howitti, sp. nov. (PI. XVIIL, Fig. 1). 



Description. — Shell large, subulate, with a rather broad base, 

 and consisting of about six smooth, flattened spire-whorls, and 

 about two depressed embryonic whorls of a somewhat convex 

 aspect. The shell, though rapidly tapering as a whole, is some- 

 what blunted at the apex by the depression of the small em- 

 bryonic whorls ; the general apical angle ranges from thirty to 

 forty degrees, but the taper is not uniform, the spire taper 

 averaging thirty to thirty-five degrees, but near the apex it falls 

 away much more rapidly. 



Whorls flat and only showing oblique lines of prowth, except 

 the body-whorl which shows faint spiral lines increasing in 

 strength and number towards the base, about ten or twelve 

 fairly strong spiral ridges showing at the base, suture slightly 

 impressed, the later whorls developing a com^iaratively broad 

 and striing sutural band, being on the penultimate whorl about 

 one-fifth the height of the whorl. Aperture subovate, outer lip 

 thin ; columella short, twisted, and truncated at the base. 



Dimensions. — Type, length, 27 mm. • greatest breadth, 12 

 mm. ; height of aperture, 9 mm. ; breadth of aperture, 5 mm. 

 Smaller examples do'wn to length, 19 mm. ; breadth, 9 ; and 

 length, 15 mm. ; breadth, 7 mm. 



An extra fine and large specimen is in the National Museum 

 collection, Melbourne, and was presented by Mr. A. W. Ho\\'itt, 

 and the dimensions of it have been kindly given to me by Mr. 

 F. Chapman, as — length, 35 mm. ; greatest breadth, 13.5 mm. ; 

 width of aperture, 6 mm. 



Locahty. — Sandy clays of Jimmy's Point, Gippsland. — Kal- 

 imnan. — ^Miocene. 



Observations. — This species can at once be distinguished from 

 our living B. fasciata by its more robust habit and striking 

 sutural band amongst other features. It affords me much plea- 

 sure to name this species after Mr. A. W. Howitt, by whom it 

 was collected many years ago during the carrying out of his 



