388 
Gflycimeris tnaccoyi, Johnston A full examination of a large series of 
sp. the above fossils, compared with other 
examples from our principal Cainozoic 
horizons, both in Victoria and Tas¬ 
mania, shows some interesting muta¬ 
tions or steps in development from 
the comparatively small shell of the 
Balcombian, through the massive 
Miocene form, and merging off in 
New Zealand seas as the living G. 
laticostata, with the small variant 
found in the Kalimnan, which links 
on to G. subtrigonalis, Tate, of that 
formation. 
Trigonia lamarchi, Gray .. Occurs here about the summit of the 
Janjukian, and for the first time as a 
fossil. It is now confined to lati¬ 
tudes not farther south than Port 
Jackson. A Kalimnan offshoot of 
this species occurs in Trigonia 
Inowitti. 
Pecten murrayanus, Tate .. Found practically throughout the 
southern Australian Tertiaries, and 
is well represented in the borings at 
Janjukian and Kalimnan horizons. 
It has apparently undergone no 
marked change for the whole of the 
great Tertiary period, since it is 
represented by the almost identical 
species P. leopardus, Peeve (W. and 
N. Australia and New Caledonia); 
P. Solaris, Born sp. (China Seas and 
Amboyna); and P. Jcuhnholtzi, Ber- 
nardi (New Caledonia). 
Arcoperna scapha, Verco .. It is extremely interesting to find this 
living species of South Australia, 
Victoria and New South Wales repre¬ 
sented in the bore for the first time 
as a fossil, in undoubted Janjukian 
(Miocene) strata. 
Condylocardia tenuicostce , This striking little species is newly 
Chapm. and Gabr. described from the bore, and occurs 
apparently at the top of the Jan¬ 
jukian series. It is related in some 
respects to the living C. pectinata, 
Tate and May sp. 
Mochefortia donaciformis, 
Angas sp. 
This is a living species on the coast of 
Victoria, Tasmania and New South 
Wales. It occurs in the bores for 
the first time as a ossil, in the poly- 
zoal rock (Janjukian). 
