Author's Catalogue. 391 
the general public, time alone will demonstrate, but from the stand- 
point of accuracy of statemer^t, Mr. Lucas' account is as good as 
present knowledge and one author can make it. It may be that in 
the future, the great popular books 'on scientific subjects will be pre- 
pared by a symposium of specialists, and then edited by some master 
teacher as John Fisk or John Lord. 
To the average reader, the vertebrates will lon^ remain as the 
most interesting forms of extinct life because of their resemblance to 
animals familiar to him, or because of their greater complexity of 
structure and size. Li the chapter "Dragons of sea and air," th-j 
reader is told of fishes 20 feet long, turtles that weighed ia the flesh 
about 2 tons, sailiiiig reptiles having spread of wings 20 feet across 
and which in life did not weigh more than 25 pounds, and of a Di- 
nosaur having 1600 teeth. On page 229 we are told that Brontosaurus 
had two pounds of brain, to twenty tons of flesh, and on page 163 that 
man has about the same weight of brain to one hundred pounds of 
total mass. 
In the chapter entitled "The rise of the mammals," a short but in- 
teresting account of the Titanotheres is given with two good drawin.gs 
of heads of the oldest and most recent species as they appeared in 
the flesh. Another interesting chapter is the one entitled "The life of 
yesterday" in which the reader is told of the derivation, and migration 
of such familiar brutes as the horse, mastodon, mammoth, bison, bear, 
etc. 
The typography and printing are excellent, but the small cost of 
the book prevents elaborate illustrations and but few new figures are 
added. However, all of the illustrations are from good to passable 
excepting- on,e designated "Devonian fishes" which has been badlv 
mutilated in cutting down the plate made for Hutchison's book, 
"Creatures of other days." A slip of the pen occurs on page 92 where 
Postdam sandstone of Cambrian time is used in place of Catskill sand- 
ston,e of the Upper Devoniain. c. s. 
MONTHLY AUTHOR'S CATALOGUE 
OF AMERICAN GEOLOGICAL LITERATURE 
ARRANGED ALPHABETICALLY. 
ADAMS, C. C. 
Postglacial origin and migrations of life of the Northeastern 
United States. II. (Jour. Geog., vol. 1, Oct. 1302, pp. 352-357.) 
AMI, H. M. 
Bibliography of the late George Mercer Dawson. (Can. Rec. Sei.. 
vol. 8, No. 8, July, 1902, pp. 503-516.) 
