Geology and Natural History. 403 



cies, or so-called species, found fossil in the successive geological 

 formations, and of those now existing, with diagrams illustrating 

 the progress of the several grand divisions. 



The volume contains also a copy of the colored geological map 

 of the United States by Mr. McGee, of the Survey, already no- 

 ticed in this Journal. 



7. The work of the International Congress of Geologists and 

 of its Committees; published by the American Committee, under 

 the direction of Dr. Persieor Feazeb, Secretary. 110 pp. 8vo, 

 1886. — This pamphlet contains Dr. Frazer's report of the discus- 

 sions at the Congress, together with a general notice of the meet- 

 ing, extracts from the very valuable report of 147 pages published 

 in England, by the English Committee, and from the reports of 

 some of the European Committees. It also presents, on a folded 

 plate, the scheme of colors for geological maps, proposed by the 

 Congress and used on the geological map of Europe now in 

 course of publication. Through the distribution of the scheme it 

 is hoped that a general uniformity may be ultimately secured in 

 the maps of all lands. Complete uniformity between the different 

 nations as to geological terms or colors is not to be expected on 

 account of existing differences among them' in language, in rock 

 formations and their unequal display, and in geological opinions 

 based partly on differences of progress in some of the divisions of 

 the science, and partially on national preferences. 



Great credit is due to Dr. Frazer for his labors as Secretary of 

 the American Committee and as editor of the report now issued. 

 Those wishing copies of the Report should address Dr. Frazer, 

 in Philadelphia, and enclose fifty cents — the cost of publication. 



8. Mastodon, Llama, etc., from Florida. — Professor Leidy has 

 reported (Proc. Philad. Acad. N. Sci., 1886, 11) the occurrence of 

 bones of Mastodon, Auchenia (llama), Hippotherium, Rhinoceros 

 and Megatherium, near Archer, Florida. Some of the mastodon 

 bones are very near M. angustidens in species, and are named M. 

 (Trilophodon) Floridanus. Three species of llama are supposed 

 to be indicated and the names proposed for them are A. major, 

 A. minor, and A. minimus. 



9. Fossil leaves in Staten Island and Long Island Clay beds. 

 (Trans. N. Y. Acad. Sci., iii, 30). — Leaves in clay beds are here 

 reported by Dr. N. L. Britton from the southern end of Staten 

 Island and from Glen Cove, Long Island, the beds at both places 

 apparently of the same age with the plant-bearing clay beds of 

 the Middle Cretaceous in New Jersey. Dr. J. S. Newberry 

 stated that he had already exhibited similar specimens from 

 Williamsburg, Lloyd's Neck and Glen Cove, Long Island, includ- 

 ing large numbers of angiospermous leaves, which were probably 

 of the age of the Raritan clays. 



10. Systematische Vbersicht der fossiler Myriapoden, Arach- 

 noideen und Insekten, von S. H. Scuddee. (Verlag von R. 

 Oldenbourg, Mtinchen u. Leipzig). — This important, well illus- 

 trated review of fossil myriapods, arachnoids and insects, covers 



