1897.] Recent Literature. 419 
even those as yet undescribed, were freely offered, and their bearings 
fully explained ; a helpfulness often acknowledged by most of his fellow 
paleontologists in their published papers, and all the more noticeable 
from its rarity in other quarters. 
Another characteristic of Professor Cope was his readiness to admit 
a mistake or to correct an error when shown the truth. Instances of 
this are numerous. In the pages of this journal, to cite a single exam- 
ple, he severely criticised the late H. B. Pollard, for his theory that the 
Batrachia had arisen from the Crossopterygian Ganoids. Scarcea year 
later he accepted the same view, and advocated it in his later publica- 
tions. 
He was a most indefatigable student, and his capacity for work was 
astonishing. His house was his workshop, and his collections fairly 
crowded the family out, so that they had to seek other quarters. Every- 
where there were either books or specimens. The cellar was filled with 
alcoholic collections, the upper floor with skins and skeletons, while the 
other floors were almost solidly filled with fossils. Some years ago his 
mammalian fossils passed into the possession of the Americah Museum 
of Natural History, in New York City. At the time of his death he 
was engaged in working up the fossils found in the Port Kennedy bone 
cave. 
Professor Cope was married to Annie, the daughter of Richard Pym, 
who, with their daughter Julia, now the wife of William H. Collins, 
Professor of Astronomy in Haverford College, survive him. 
. KINGSLEY. 
RECENT LITERATURE. 
Surface Features, Missouri Geological Survey.—Charles R. 
Keyes, State Geologist, vol. X, 543 pages with 22 plates and 24 figures. 
Clay Deposits, Missouri Geological Survey, Charles R. Keyes, State 
Geologist, vol. XI, 622 pages with 39 plates and 15 figures. 
Volume X, contains a report on the Physical Features of jiju 
by C. F. Marbut, one on the Formation of the Quaternary Deposits 
by J. E. Todd and a Bibliography of Missouri Geology by R. Keyes. 
The report on Physical Features is the first work of the kind under- 
taken by any State Survey with the view of covering the entire com- 
monwealth. The different surface features are described and their 
origin traced by the application of the principles of physiography. 
A broad gently undulating upland plain forms the most conspicu- 
ous feature of the surface. It is divisible into the Prairie region and 
