SILURIAN B1VALVED MOLLUSCA OF VICTORIA. 
australis , nov., and Parallelodon kilmoriensis, sp. nov. I he 
CuculleUa , sp., noted on \ sheet 3 N.K., by McCoy, I have 
now referred to Nuculites coarctatus, Phillips sp. 
The following genera, of bivalved shclis have been recorded 
from the Silurian ("Upper Silurian”) of Victoria by McCoy, 
in Progress Report, Cool. Surv. of Victoria, No. I, 1874, p. 34. 
CuculleUa, 2 spp. [ = Nuculites]. 
Arm, sp. [ = Nucula and ? Parallelodon]. 
A vicula, 2 spp. [ = Actinopteria], 
The fossil (No. 3368, Mines Dept.) alluded to by McCoy, in 
Progress Report No. IV., 1877, p. 156, as “a small Aviculoid 
shell allied to A mb onychia (new species)”, is here described and 
figured as probably a young form of a new species — Lunuh- 
ca/rdi u in an ti striatum. 
Three species of Silurian pelecypoda, which had already 
been described by the Rev. A. W. Cresswell, M.A.A have been 
presented by him to our collection. These are ( 'onocardium 
bellulum and C. costatvm , originally described under the generic 
name Pleuror/iynchus ; and Pterinea to, tea , previously described 
as an A m bony chi a, but probably identical with P. lineata, 
Gold fuss. 
The larger part of t he remainder of these Silurian bivalved 
shells has been obtained from the richly fossili ferous mudstones 
at South Yarra over the area, of the Yarra Improvement Works. 
They were chiefly collected bv Mr. F. P. Spry (now of the 
National Museum). Other gentlemen who have kindly assisted 
us in obtaining new material art' Messrs. J. T. Jutson, and A. 1C 
Kitson, F.G.S.. whilst the opportune donation from Mr. Thos. 
Warr, of material from a well-boring at Croydon,! has resulted 
in the addition of several new and remarkable forms of aviculoid 
and other shells. In addition to the species previously men- 
tioned, we are also indebted to the llev A. W. Cresswell, M.A., 
for a valuable collection of mudstone fossils from near Lily- 
dale, t which has furnished us with several additional forms to 
our list of species. 
Some General Aspects of the Silurian Pivalvkp Fauna. 
The collection now described comprises 62 species and 
varieties, referred to 29 genera. Of the total number, as many 
as 58 species and varieties are here recorded from the Victorian 
* proc. Hoy. Silt:. Viet., Vol. V., N.S., 1893, pp. 43, 44. 
f |,' or preliminary ilesrription of this collodion see Victorian Naturalist, Vol 
XXTTL, 1906, pp. 237.T39. 
£ See Mr. ( 'rrsswell's remarks oil the lossils anil the precise localities in I’roc. Roy. — 
Soc., Viet., Vol. VL, N.S., 1804, p, 156. 
