658 The American Naturalist. [July, 
Cenozoic, but to which system the fauna belongs it is difficult to dis- 
cover. None of the genera have been found in the Amyzon shales, 
and but one in the Green River shales, so that their pertinence 
to the Eocene fauna is doubtful. The chalky matrix much resembles 
that of some localities of the White River Neocene (Oligocene), and I 
should not be surprised if it should be found that this is the age of the 
fossils. It is likely that they were lacustrine in habitat.—E. D. 
Cope. 
Geological News.—Paleozoic.—G. M. Dawson calls attention 
to the great Cambrian formation of the Selkirk Range. Its estimated 
thickness is about 40,000 feet. (Bull. Geo. Soc. Am., Vol. II., pp. 
165-176. )———Mr. H. M. Ami has found a fauna in the Quebec city 
rocks which is distinct from that of Point Levis. If his determination 
of the fauna is correct, the horizon of these rocks is that of the Tren- 
ton. (Bull. Geol. Soc. Am., Vol. II., pp. 477-502.) Mr. J. L. 
James considers the Maquoketa shales an extension of the Cincinnati 
group. He bases this opinion on studies of rocks of the Cincinnati 
age from Richmond, Indiana, to Savannah, Illinois. (Am. Geol., 
June, 1890.) H. R. Geiger and Arthur Keith classify the sandstones 
of the Blue Ridge near Harper’s Ferry as Upper Silurian. (Bull. 
Geol. Soc. Am., Vol. IL, pp. 155-164, pls. 4, 5.) Mr. J. E 
Whiteaves has recently described and figured several new species of 
fossils from the Devonian rocks of Manitoba. The list comprises one 
Brachiopod, three Mollusks, two Gasteropods, and nine Cephalopods. 
(Trans. Roy. Soc. Can., Sect. IV., 1890.) Mr. S. A. Miller 
reports forty new species of Crinoids from the Lower Carboniferous of 
Missouri. More than half of the number belong to the genus Platy- 
crimus. (Bull. No. 4, Mo. Geol. Surv.) 




Mesozoic.—Mr. A. Smith Woodward has added the following new 
species to the list of British Jurassic fishes : Eurycormus grandis, Hyp- 
socormus leedsi, H. tenuirostris, Leedsichtlys problematicus, Brown- 
eichthys ornatus. (Geol. Mag., Oct., 1889.) 
Cenozoic.—During the past season Mr. G. F, Becker has found 
additional reasons for maintaining the existence of diabase in the 
Washoe Cenozoic rocks, and also for dividing the pyroxene andesite 
into two distinct outflows, separated by a long interval of time. (Bull. 
No. 6, Cal. Acad. Science.) —Mr. N. H. Darton, of the U. S. Geol. 
Surv., names the Eocene formation which extends through Maryland 
and Virginia the Pamunky, and the Miocene of the same region the 
Chesapeake. (Bull. Geol. Soc. Am., Vol. II,, pp. 431-450, pl. 16. 


