168 



Last wliorl small, with a rather short rounded base ending in 

 a twisted reverted, emarginate beak. 



Transverse ribs, narrow, rounded, ill- defined, except on the 

 posterior whorls, about 12 to a whorl. Spiral lirte thick, 

 depressed, inconspicuous, about seven on the medial and pos- 

 terior areas o£ the penultimate whorl ; obsolete on the middle 

 of the last whorl, but prominent on its base. AVhole surface 

 closely transversely striated. 



Aperture oval ; outer lip thin, slightly insinuated behind 

 the shoulder, without, about 20 slender spiral ridges within. 



Length, 20 ; breadth, 8 ; length of aperture and canal, 10. 



Locality. — Lower beds at Muddy Creek. 



4. Phos Gregsoni, sjyec. nov. 



Shell similar to P. cominelloides, but the whorls are sub- 

 angularly convex by reason of the largely developed costae ; 

 the basal whorl is narrower, and the apex is different, which 

 consists of three high turbinated whorls, and is rendered con- 

 spicuous by the disproportionate increase in size of the whorl 

 next below it. 



The costa? are rounded, distant, eight to a whorl, vanishing 

 behind the shoulder, but are continued to the base of the body 

 whorl. Spiral lircT, about six, depressed, equal and equidistant 

 on the posterior slope of the penultimate whorl, about twelve 

 alternately large and small on the rest of the whorl. Outer 

 lip not insinuated behind the shoulder. 



Length, 19 ; breadth, 8"5 ; length of aperture and canal, 8"5. 



Localities. — Jemmy's Point and Cunninghame, Gippsland 

 (JV. S. Gregsoni). 



Species-name in compliment to Mr. G-regson, of Bairnsdale, 

 to whom I am indebted for the gift of this and other species of 

 the Gippsland Tertiary beds. 



5. Phos tuberculatus, spec. nov. Plate s., fig. 5. 



Shell ovately pyramidal, stout, costated and lirate, with a 

 rather high gradated spire, ending in a subcylindrical a|)ex of 

 three smooth whorls. Whorls below the apex, five, of rather 

 rapid increase, short, with a high rounded shoulder concave 

 behind. 



Costse, about 11 to a whorl, thick, rounded, equidistant, pro- 

 minent only on the angulation, faintly prolonged to the 

 anterior suture of the spire whorls ; crenulated by conspicuous 

 lira? ; lirae on body wliorl confined to the angulation and to the 

 base. 



Aperture oblong ; outer lip acute, smooth within ; beak 

 short, twisted, reverted, and emarginate. 



Length, 22 ; breadth, 10"5 ; length of aperture and canal, 11. 



Locality. — Upper beds at Muddy Creek {J. Dennantl). 



