322 CJiapman and Gabriel : 



Observations. — This very distinct little Eissoa does not seem 

 to be matched or even approached by any other form, living or 

 fossil, at any rate in Australian faunas. We take the opportunity 

 of naming the species after our friend Mr. J. H. Gatliff, who has 

 worked so assiduously amongst the gasteropod fauna of the Vic- 

 torian coast. 



Distribution. — Bore lU, 225-230 feet, four specimens). 



Sub-genus ONOBA, H. and A. Adams. 

 RissOA (Onoba) bassiana, Hedley. (PI. XXVIIL., Fig. 31). 



Ofioba bassiana, Hedley, 1911, Zool. Results. F.I.S. " En- 

 deavour," Part I., p. 108, pi. xix. fig. 25. 

 Observations. — This species was lately described by Mr. Hedley 

 from off Devonport, Tasmania (depth unrecorded), and it is alsa 

 known from Port Albert, Victoria (Gatliff and Gabriel). It is 

 interesting to meet with this additional example of a species which, 

 whilst occurring in the Kalimnan of the old Murray Gulf, still- 

 remains in evidence as a component of the living moUuscan fauna 

 of Bass Strait. The fossil example here figured has a length of 

 5 mm., whilst Hedley's type measures 4.5 mm. 



Distribution.— Bore 6, 158-161 feet. Bore 8, 165-180 feet; 180- 

 199 feet; 204-210 feet. Bore 9, 315-325 feet. 



RissoA (Onoba) chrysalida, sp. iiov. (PI. XXVIIL, Figs. 32, 33). 



Description. — Shell pupiform, stoutly built, polished. Whorls- 

 four, depressed convex, with a spiral or helicoid apex of two and 

 a half turns. Sutures shallow, excavated. Aperture circular, lip 

 thick. Faint colour bands parallel with and near to the sutures 

 are seen in some specimens. Under a high magnification surface 

 marked with fine growth lines. 



Dimensions. — Length, 3.1 mm.; greatest width, 1.5 mm. 



Observations. — This neat little shell is a characteristic fossil of 

 the Kalimnan series in Victoria. It is a rather variable form in 

 regard to the height of the whorls, and an extreme variety from 

 the Dennant coll. is here figured, in addition to the central type- 

 form. The same shell was named in MS. by Mr. J. Dennant as E. 

 chrysalida, and in the Dennant collection (Nat. Museum) there are 

 numerous examples collected from the upper Ijcds of Muddy Creek. 



Distribution.— Bore 8, 166-180 feet; 180-199 feet; 204-210 feet > 

 210-219 feet. Bore 9, 254-256 feet. Bore 10, 254-296 feet. 



