268 THE AMERICAN NATURALIST. [Vov. XXXIII. 
species are described, and there are notes on others not so well 
known. As in all of Miss Rathbun’s work, the recognition of salient 
characters is acute, and their expression is put in concise form. 
One or two features which persistently reappear in her writings seem 
to call for criticism. Apparently the attempt is made to arrange the 
species on a descending scale, for the series begins with the 
Maioids and ends with the Calappoids, but certainly the Ocypodoids 
are the highest of the Decapods. The other feature of which we 
would complain is the foundation of new genera (¢g., Eupanopens) 
upon characters of far less than generic value. Certainly the char- 
acters given in the following diagnosis are not of generic value. 
Carapace of moderate width, anteriorly subquadrate, crossed by 
broken transverse lines; frontal lobes sinuous ; five distinct lateral 
teeth, the third, fourth, and fifth prominent, the second usually so. 
One feature of the collection is interesting — the absence of any 
specimens of Gelasimus. 
Entomostraca of Karelia. — An extended faunistic study of the 
Entomostraca of Karelia in the region tributary to the White Sea has 
been made by Dr. K. E. Stenroos.! Especial attention was given to 
the Cladocera, of which 64 forms — an exceptionally large number — 
were found. Species are grouped as littoral or limnetic, though a 
few are members of both faunas and exhibit marked differences 
according to their environment. When found alongshore or in 
weedy shallows of the lakes they are opaque and brownish, while in 
open water they have the hyaline appearance characteristic of the 
typical limnetic fauna. Great variation was observed within the 
genus Bosmina, almost every body of water showing its own peculiar 
type. Wherever adjacent lakes presented similar physical charac- 
teristics the Bosminide found therein were much alike, but the more 
diverse the environment, the greater the unlikeness of the Bosmina 
fauna. Intermediate forms were found which seem to render neces- 
sary a considerable reduction in the number of species hitherto recog- 
nized in this genus. Chydorus rugulosus Forbes, originally described 
from Lake Superior, is reported from Finnish waters. CAR 
Notes. — The interesting amphibian, Amphiuma means, is reported 
by H. M. Smith in the Prac. of the Nat. Museum, Vol. XXI, as occurring 
in the vicinity of Hampton, Virginia, where it was found in some 
1 Stenroos,K.E. Zur Kenntniss der Crustaceen-Fauna von Russisch-Karelien, 
Acta Soc. pro Fauna et Flora Fenn., Bd. xv. 
