MOORE—AUSTRALIAN MESOZOIC GEOLOGY. Pil 
come into my hands from Western Australia, twenty at least are 
species identical with those of this country; and had it not been 
for the worn and abraded exteriors of many of the others, there is no 
doubt that the list which follows might have been extended :— 
Orgame Reneains common to England and Western Australia. 
Ammonites aalensis, var. Moorei, Lycett, Upper Lias. 
radians, Rei. Upper Lias. 
Walcottii, Sow. Upper Lias. 
macrocephalus, Schloth. Oolite. 
Brocchii, Sow. Oolite. 
Nautilus semistriatus, D’Orb. Upper Lias. 
Belemnites canaliculatus, M77. Oolite. 
Gresslya donaciformis, Goldf. Upper Lias. 
Myacites hassianus, Quenst. Middle Lias. 
Cucullea oblonga, Sow. Oolite. 
Pholadomya ovulum, 4g. Oolite. 
Avicula Miinsteri, Goldf. Oolite. 
echinata, Sow. Oolite. 
Pecten cinctus, Sow. Oolite. 
calyus, Miinst. Oolite. 
Lima proboscidea, Sow. Oolite. 
puncetata, Sow. Oolite. 
Ostrea Marshii, Sow. Oolite. 
Rhyunchonella variabilis, Schloth. Oolite. 
Cristellaria cultrata, Montfort, Oolite. 
Of the new species associated with the above, the most important, 
from its apparently great abundance in all stages of growth, is the 
Liigonia Moore, Lycett, very closely allied to 7. costata. Fifteen, 
more or less perfect, separate valves of this shell may be counted in 
a single block. The single valve presented by Mr. Gregory to the 
Geological Society, and the example sent by Mr. Shenton to the 
Exhibition from the Greenough Flats, belong to this species. 
Knowing the interest felt by Dr. Lycett, of Scarborough, in this 
eroup, I forwarded the specimens to him, and he has favoured me with 
the description appended to the species. 
The Lamellibranchiata appear to have formed a very marked fea- 
ture in the Western Australian fauna, about twenty genera being 
represented in the collection. Besides those already mentioned, 
Cucullea, Myacites, Astarie, and Avicula are the most abundant. 
The matrix with which their valves is filled may be seen to be 
crowded with Encrinital remains, spines of Hchini, and other small 
organisms, but for the most part so worn as not to be recognizable. 
Of the Gastercpoda there are five or six genera, but nearly all in 
very bad condition. The Brachiopoda are represented by a single 
species, Rhynchonella variabilis, of which there are many examples ; 
the Entomostraca by a single species; and the Foraminifera also 
by a single species of world-wide distribution, the Cristellaria 
cultrata. 
Unfortunately, with all the Australian fossils there is an absence 
of sectional details. The fact of the separate blocks having organic 
remains representing several European formations, and the abraded 
and water-worn condition of many of them, lead to the conclusion. 
VOL, XXVI,—PART I, R 
