166 THE AMERICAN NATURALIST. [VOL XXXII. 
with two or three nuclei were as frequent in occurrence as those with 
only one nucleus. Most specimens exhibited two or more large 
vacuoles. Their movements were at most sluggish, çG, H.P. 
American Fishes. — The second part of Jordan and Evermann’s 
comprehensive work on the Fishes of North and Middle America is 
just issued (Oct. 3, 1898) from the Government Printing Office. 
This volume of 943 pages contains detailed descriptions of 1883 
species of fishes. The Sparoid, Sciznoid, Labroid, and Cottoid 
families and their allies make up the bulk of the present volume. 
The third part of the catalogue of Zhe Fishes of North and Mid- 
dle America appeared about November 25. This concludes the 
text of the work, the remaining fourth part being devoted to plates 
and to a recapitulatory Check List. The three volumes, which are 
continuously paged, contain 3136 pages; 3127 species are described 
in detail, these being arranged in 1077 genera. The large number 
of genera recognized is in accord with the views of Dr. Gill and 
Dr. Bleeker, which other ichthyologists were slow in accepting. 
There is no doubt, however, that the convenience of the systematic 
zoologist is best met by the recognition of every tangible and con- 
stant structural difference as having value for generic distinction. 
‘The four volumes constitute Bulletin 47 of the United States 
National Museum. HSI 
Fauna and Flora of the Catskill Mountains.'— This paper 
contains a list of 58 trees and shrubs collected in the valleys of 
Schoharie Creek and Upper Katerskill and the surrounding moun- 
tains; 9 gastropods and a Sphærium, mostly from the Creek; Cam- 
banes bartoni, 8 fishes, 8 batrachians, 2 snakes, and a fairly complete 
list of the mammals with copious notes. 
Mr. W. P. Pycraft will study the megapodes collected by the 
Willey Expedition. Materials for the embryology were obtained. 
[he article by Ameghino upon an ‘existing species of Mylodon 
(Meomylodon listai) is reproduced in Natural Science for November. 
The evidence is a piece of skin from Patagonia, the outer surface of 
which presents a continuous, not scaly, epidermis, covered with stiff, 
reddish hair about two inches in length. In the deeper layer of the 
1 Mears, L. A. Notes on the Mammals of the Catskill Mountains, New York, 
with General Remarks on the Fauna and Flora of the Region, Proc. U. S. Nat. 
Mus., vol. xxi, pp. 341-360. 
