43 
absence of the earlier Australian types from one or other of our local Museums, 
particularly when those types are described with the meagreness and want of 
detail noticeable in many of ]\tooro’s descriptions of Australian fossils. 
This species, it need hardly he pointed out, possesses no characters in 
common with Delphiimla. 
Loc . — White Cliffs Opal-field, near AVilcannia, North-West N. S. Wales 
{J. W. Boultbee, II. F. L. Brown). 
Hor . — Upper Cretaceous (White Cliffs Opal Series). 
Colins . — Brown (Adelaide) ; and Mining and Geological Museum, 
Sydney. 
Genus — VIVIPABUS, Be Montfort, 1810. 
(Conchy). Syst., 1810, TT, p, 247.) 
VlVlI'ARlTS? ALI5.V-8COPULATIIS, Sp. nOO. 
(PI. VII, Figs. 8 and 0.) 
Sp>. Char . — Shell conical-suhovate ; spire very moderately elevated with 
an obtuse apex ; whorls four to four and a half, convex and regularly 
rounded ; body whorl more than half the length of the entire shell, rounded 
on the middle. Aperture hroad-ovate, obtusely and slightly sub-angular 
above, rounded and rather produced below; outer lip rounded; inner lip 
sufficiently reflexed to conceal the insignificant umhilicus. Sculpture of 
very fine lines of growth on the posterior Avhorls, hccoming coarser on the 
body whorl, with traces of a few obscure revolving lines on the latter only. 
Obs.— -Pi.\\ indefinite shell, with the outward appearance of a Viviparus. 
I have not seen a similar type from any other horizon in our Cretaceous. 
In form it ajiproachcs U. Leal, At. and H. 
Zoc.— White Cliffs Opal-field, near 'Wilcannia, North-West N. S. 
Wales {II Y. L. Brown). 
Ilor . — Upper Cretaceous (White Cliffs Opal Series). 
Col hi. — Brown. 
