Recent Books and Pamphlets. 28t- 
the history of single characters, one at a time, is a history of the 
whole; third, because the interruptions in the geological record 
will always prevent us from making complete phylogenetic series, 
and our tangible breaks will be transverse to phylogenetic lines ; 
and it is on these breaks that the system will ever depend. Such a 
system may be called artificial, but it is the only system with defi- 
nitions that we can ever have. As a consequence of his views on 
this subject, Mr. Seebohm combines species with three toes in the 
same genus as those with four, and species-with an expanded bill 
(Eurynorhynchus) with species without such expansion (Tringa). 
e most American zoologists, Mr. Seebohm finds it necessary 
to adopt sub-specific names, or the trinomial system, for protean 
groups. In this way the relations of the forms are well expressed 
throughout this work. 
We wonder when the wealthier men of the United States will 
begin to devote some of their spare time and means to the produc- 
tion es works like this admirable combination of science and art.. 
— 
. . . 
RECENT BOOKS AND PAMPHLETS. 
Boettger, “ir esr, zur Herpetologie und Malakazoologie Südwest 
Afrikas men bd. u. d. Senck. Nat. Ges. 1886. From the author. 
Obrontschew ste dis rendu Prdliminaire sur les Recherche Géolo- 
ae ‘dans lé istrict Transcaspien. Bull. du Comité Géologique. 
Ka Pi sok 
"Bont A -Conpe-en d du Comité Géologique en 1886. Bull. du. 
Michael, W.—History of Abury, Wiltshire, Eng. From the author. 
» T. H—Snake and Sonerii» Mounds in Minnesota. Ext. 
Science. 1887. From the author 
J. W— 
author. List of publications of J. W. Spencer. From the 
Jor 
A -hg of the American Species of Tetradontide. 
Edwarda., o L. J^E oc, U. S. Nat. Mus., 1886. From the authors. 
Taoa S.—The cue tune From Proc. Amer. Soc. Ps eye hical 
ry earch. 1886.—Zur Kenntniss der Insektenha = Sep.-abd. a. d. 
rechiv fiir mikroskop. Anatomie. B. xxviii.—Structure of the Hu u- 
p, Skin. Amer. Nat. extra. June, 1886. —On the Conditions to 
illed by a Theory of Life. Ext. Proc. A. A. A. S. 1883. All 
from the author 
TRAY, R.—A Wodan of Colors for Naturalists, and ite eeri 
i a of Useful Knowledge for Ornithologists. 1886. From 
Bartlett, J. R,— 
—Annual Report of the Hydrographer oie A Bureau of 
Navigation fo ioe y 
graphie Ome ‘Be year ending June 30, 1886. From the Hydro- 
Ja 
‘fo J. F—Protozoa of the Cincinnati Group. Ext. Jour. Cinein: 
t. Hist. 1887. From the author. 
