Notices of Memoirs—R. B. Newton—Keuper Mollusca. 507 
preserved in the British Museum. With the exception of the fore 
limbs and neck, nearly the whole of the skeleton has been preserved. 
Much of the skull has been very successfully cleared from the matrix 
by Mr. Richard Hall, of the British Museum, and was exhibited at 
a soirée of the Royal Society, when its resemblance to Aétosaurus 
was pointed out by Mr. Arthur Smith Woodward. ‘This reptile is 
of much interest, as it seems to be an intermediate form between 
crocodiles and dinosaurs, being, apparently, related on the one hand 
to the Parasuchia and on the other to the theropodous dinosaurs. 
The skull is, in fact, that of a miniature megalosaur. 
TX.—Nors on some Moriuscan REMAINS LATELY DISCOVERED IN THE 
Enewish Keurer. By R. Butten Newton, F.G.S. British 
Museum (Natural History). 
HIS communication directs attention to the discovery, by the 
Rev. P. B. Brodie and Mr. E. P. Richards, of some obscure 
impressions of lamellibranch shells in the green gritty marls of the 
Upper Keuper Sandstone of Shrewley, Warwickshire, which form the 
first evidence of a molluscan fauna from these beds as developed in 
this county. The matrix appears to be so peculiarly unfavourable 
for the retention of shell structure that it is doubtful whether any 
better material than the present will ever be forthcoming. The 
specimens indicate truly marine types, though on account of bad 
preservation only three of them could be selected for description as 
exhibiting certain characters in their contours and sculpturing, which 
might be of service in ascertaining their probable generic positions. 
Estheria minuta is the one invertebrate form hitherto recorded from 
the British Keuper; that is, excluding the Foraminifera described by 
Professor T. R. Jones and W. K. Parker,! which came from an 
alabaster pit at Chellaston, near Derby, and which were doubtfully 
referred by the authors to an Upper Triassic age. The very modern 
facies of the Foraminifera has suggested the highly probable idea 
that they were derived from superficial deposits. 
Associated in the matrix containing these molluscan impressions 
are fragments of Cestraciont spines and teeth (Acrodus Keuperinus) 
and a part of a carapace of the small phyllopodous crustacean, 
Estheria minuta. 
The specimens described are identified as— 
(1) Thracia (?) Brodies (nu. sp.). 
(2) Goniomya Keuperina (n. sp.). 
(3) Pholadomya (?) Richardsi (un. sp.). 
Such generic forms as are represented here have not apparently 
been reported from rocks of a similar period on the Continent or 
elsewhere. 
1<¢On some Fossil Foraminifera from Chellaston, near Derby,” Quart. Journ, 
Geol. Soc., 1860, vol. xvi. pls. 19, 20, pp. 402—468. 
