$4.00 per Year. 
AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
Vol. XXIV. AUGUST, 1:890. No. 28. 
CONTENTS 
PAGE 
THE EXTINCT SIRENIA [Illustrated], . E. D. Cope, 697 
THE CONCRESCENCE THEORY OF THE VERTEBRATE re Ihe Cuboides Zone Fhe Echinodermats nt the 
Carboniferous =A deis di find of Castoroid 
EMBRYO [Illustrated], . Charles-Sedgwick PE 702 at Now WEE 
THE HISTORY OF GARDEN VEGETABLES Cænozoie,. : 
E L- erik rant, 719 
THE NOTES OF SOME OF OUR BIRDS, 
John Vance Cheney, 745 
EDITORIAL.— The poss Habits of the American 
ublic 
<= 6 9 B rm » Pe ve * 
RECENT Books AND PAMPHLETS, . . .. . .. . 748 
_ = RECENT LITERATURE. | 
= Eimer on Evolution — Geddes and ee on nm ology. Zum REN New P alan 
= Maple e Bar Lousm. . en 
GENERAL NOTES 
Geography == Traver Meno » 22.2, .—..29 |SOENIIMC NEWS, u. a 
PHILADELPHIA: 
FERRIS BROS,, PUBLISHERS. 
SIXTH AND ARCH STREETS 
