New <ind Rare Fost^iU. 315 



K.'iiii. SIPIIONODEXTALIIDAE. 

 Ceiiiis CADULUS. Philippi. 

 Cadulus ACUMINATUS, TatH. 



Cadulus acii/ni/iatus, Tate, 1887, Trans. Roy. Soc. S. 

 Aust., vol. ix. (for 1885), p. 194. Idem. 1899, ibid., 

 vol. xxiii. (for 1898-9), p. 266, pi. viii. fig. 12. 



Observations. — This species is separated from 0. infans^ by some 

 •slight characters, which are nevertheless constant. It is an interest- 

 ing point with regard to the above species that as a fossil, C. acumi- 

 natus is confined to the Lower Pliocene (Kalimnanj or " Oyster 

 beds " of Aldinga. whilst C. infans is only found at Muddy Creek, 

 in beds of the same age. This is an additional proof of the relation- 

 ship of the Mallee Cainozoic marine fauna with the rest of the 

 Murray Gulf occurrences, for the Hamilton Kalimnan sea appears 

 to have been partially shut off from the former by the porphyry and 

 .granite cliffs of south-western Victoria. 



G. acumiyiatus is found living around the coasts of New South 

 Wales, Victoria and South Australia. 



Distrihutio7i. — Bore 11, 175-199 feet. 



Class GASTEROPODA. 



Fam. DELPHI NULIDAE. 



Genus LIOTIA. Gray. 



LiOTiA DENNANTi, sp. nov. (Plate XXVII., Figs. 22, 23). 



Description. — In form somewhat trochoid, consisting of four 

 ■u'horls; the first two somewhat depressed with a slightly discernible 

 fine medium keel, becoming more pronounced in the third and 

 fourth whorls ; the last whorl subangulate, with a narrow, sub- 

 .jingular median and basal keel. Sutures excavated. The area 

 between the keels depressed or gently concave, the surface crossed 

 with fine, curved threads. Surface of each whorl immediately 

 below the suture faintly nodulose. 



Dimensions. — Height. •"^.5 mm. ; greatest diameter. 4.5 mm. 



Affinities. — This species appears to be nearest allied to the living 

 Liotia mayana, Tate,., It essentially differs from that species, how- 



1. Tate, Trans. Roy. Soc. S. Austr., vol. x.xiii., 1899, p. 266, pi. viii., fiff. 11. 



2. Trans. Roy. Soc. S. Austr., vol. xxiii., 1899, p. 227, pi. vi., figs. bae. 



