568 General Notes. [June 
chiefly of reddish marls of fluvio-lacustrine origin. A Hip- 
parion, probably identical with the Pikermi Æ. gracile, is t 
most abundant. Giraffa attica, Paleoryx pallasi, Sus erymanthius, 
Mastodon pentelici, and Helladotherium duvernoyi are among the 
‘remains, as is also the French Felis brevirostris. 
The lower jaw of a Machærodus has been described from the 
“ Forest-Bed” at Kessingland, Suffolk, England. The describer, 
Mr. J. Backhouse, stated his belief that hitherto no lower jaw of 
the genus had been found in England. 
Mr. Lydekker has given to the Geological Society of London 
a.list of the Cetacea of the Oxford Crag. These include Bal- 
æna (4 sp.), Megaptera (3 sp.), Balznoptera (4 sp.), Cetotherium 
(4 sp.), and Herpetocetus scaldiensis, together with nineteen species 
of Physeteridz, one Squalodont, and three Delphinide. There 
; are seven species of Mesoplodon. 
Out of seventy-eight species or varieties of ,chilostomatous 
Bryozoa from a deposit in New Zealand, which was considered 
Miocene by Tenison-Woods, sixty-one are known living, and it 
would thus seem that too remote an age has been assigned to 
the deposit. 
beds, which are situated to the east of Lake Urumia, consist 
MINERALOGY AND PETROGRAPHY.« 
Petrographical News.—The second? paper devoted to the 
study of the massive rocks belonging to the “ Cortland series” 
on the Hudson River, near Peekskill, has recently appeared in 
the American Fournal of Science; In this paper the author, Dr. 
_ imbedded smaller crystals of plagioclase. Under the microscope ' 
__ the former is seen to possess a “ shagreen” surface, due to numer- 
i ous oval indentations. All the feldspar of the norites is filled with 
x little inclusions of plates, rods, and dots, These seem not to be 
arranged in any definite position with regard to crystallographic 
See Edited by Dr. W. S. BAyLEy, Madison, Wisconsin, 
_ * Of American Naturalist, March, 1886, p. 275. 
vi 1 Amer. Jour. Sejemea, minii February, p. 135; March, ws rot. 
