Bibliographical Notices. 129 
undoubtedly postglacial ; but he inclines to consider the lower brick- 
earth of the Thames valley, where the musk-sheep has been found 
at Crayford, as anterior to the Boulder-clay, which occupies the 
district to the north. This deposit at Trimingham, however, is 
certainly preglacial; and so Ovibos moschatus belongs to a fauna 
which arrived in our country prior to the extreme refrigeration of 
climate which characterized the glacial epoch, and afterwards re- 
treated northwards to its present haunts, showing, with other 
evidence, that this epoch did not form a hard-and-fast barrier 
between two faunas. 
2. “On some New or imperfectly known Madreporaria from the 
Coral Rag and Portland Oolite of the Counties of Wilts, Oxford, 
Cambridge, and York.” By R. F. Tomes, Esq., F.G.8. 
The author, after pointing out the poverty of the British Corallian 
rocks in genera and species of corals as compared with the strata of 
equivalent age on the continent, proceeded to describe a section in 
the Middle Oolite at Highworth. 
The author then described species of Astrocwnia, Dimorpharea, 
and Latimeandrina, genera not hitherto recognized in the British 
Corallian ; and for one of the forms he has discovered he proposed a 
new genus, to which he gives the name of Crateroseris. The paper 
concluded with some remarks on the well-known Jsastrwa oblonga 
of the Portland beds. 
BIBLIOGRAPHICAL NOTICES. 
Mémoires de VAcadémie Impériale des Sciences de St. Pétersbourg. 
7° série, tome xxxi. No. 5. Miscellanea Silurica III. 1. Sup- 
plement * to the Monograph of the Russian Leperditie. II. The 
Crustacean Fauna of the Kurypterus-beds of Rootzikill, Oesel. 
By Magister Fr. Scuurpr, Fellow of the Academy. With 9 
plates. 4to 1883. 
In 1873 M. Fr. Schmidt (‘ Miscellanea Silurica,” I.) published a 
revision of the then-known Leperditie and Isochilinew, and added 
several new species, with good illustrations. He figured and de- 
scribed :— 
on 
. Leperditia grandis, Schrenck, pp. 9, 10, figs. 1, 3-6 a. 
2. L. Barbotana, n. sp., pp. 9, 12, figs. 7-9 a. 
3. L. Tyraica, n. sp., p. 9, figs. 2, 10-12. 
4, L. Angelini, n. sp., pp. 9, 13, figs. 138-17. Var. ornata, 
Kichw., pp. 9, 14, fig. 18. 
5. L. baltica, Hisinger, pp. 9, 15. 
* “Nachtrag zur Monographie der russischen silurischen Leperditien,” 
&e. 
