145 



11-5; breadth of aperture at front, 2. Imperfect specimens have 

 a length of 25 mills. 



Locality. — Lower beds at Muddy Creek. 



A very much more slender shell, with a longer spire, than 

 0. australis, Duclos. 



2. Oliva Adelaidse, sj:>ec. nov. Plate viii., fig. 6. 



Shell elongate-ovate, shining ; spire bluntly acuminate, of four 

 whorls, channelled at the suture; aperture longer than the spire; 

 outer lip slightly arched, truncate at the base ; columella slightly 

 twisted and plicate anteriorly. 



Dimensions. — Length, 10.5 ; breadth, 4 ; length of aper- 

 ture, 6. 



Locality. — Clayey-green- sands, Adelaide-bore. 



This fossil has the general appearance of 0. j)ardalis and 

 0. leucozona, of New South Wales, but it is proportionately 

 stouter, the apex is blunt, and the aperture is longer and nar- 

 rower at the front. The relative dimensions respectively of 

 0. Adelaidce and 0. pardalis are — Length, 10 and 10 ; breadth, 

 3 '8 and 3-3 ; length of aperture, 6-3 and Q-5. 



3. Oliva nymphalis, spec. nov. Plate viii., fig, 7. 



Shell acuminately oblong, with a moderate exsert spire, ending 

 in a small subgiobose tip ; whorls five, narrov/ly channelled at the 

 suture. 



Very much like 0. nivea, Gmelin, but it is more ventricose, 

 wider, and not so deeply grooved at the suture ; it also resembles 

 0. triticea, Duclos, but has a shorter spire. 



Dimensions. — Length, 10; breadth, 4*5 ; length of aperture, 

 6-5. 



Localities. — Bairnsdale, Jemmy's Point, and Cunninghame, 

 Gippsland ( W. H. Gregson /); upper beds at Muddy Creek 

 (J. Dennant /). 



Genus Ancillaeia, 

 synopsis of species. 

 Enamel of spire spirally ridged. 



Spire acuminate; apex pointed; broadly depressed at suture. 



1. A. orycta. 



Spire cylindrical; apex papillary. 2. A. j^ajnllata. 



Spire subscalar. 3. A. subgradata. 



Enamel of spire without spiral ridges. 



Spire tumid; shell subcylindrical. 4. A. Itehera. 



Spire tapering. 



Non-callous surface of shell conspicuously spirally striated. 



5. A. subamjjliata. 

 Non-callous surface plain or obscurely spirally striated. 



K 



