1883. ] Zoölogy. 705 
Forbes ?” It is at least the southern representative of this spe- 
cies, which consequently is distributed from the Great lakes in 
Minnesota to the gulf. The similarity to C. dicuspidatus Cls., is 
very close. 
The description of Epischura (pp. 384-85) was written before 
the second part of Mr. Forbes’ paper was obtained, and in making 
up for the press, the generic description given in that place was 
not referred to. It might be inferred from remarks on p. 384, 
that in Æ. /acustris the female has a structural modification of the 
abdomen, which is obviously not stated by Forbes. 
Although the writer has since succeeded in rearing one Cope- 
pod (Canthocamptus), and observing the transition from one of 
the dimorphic conditions to another, and the two stages, in both 
of which eggs are carried, are strikingly diverse, it should be 
admitted that perhaps too much confidence was expressed in the 
inferred conclusions upon Diaptomus. 
It may be that Brady has confused two distinct species in his 
account of D. castor, inasmuch as his descriptions disagree with 
those of Sars. It is evident that the same peculiarities of distri- 
bution maintain in England as here, however explained. Correc- 
tions and information bearing upon these questions are earnestly 
solicited. 
greater elongation of the antennz in the former. There is a dif- 
ference of .1™ in the length of the living adults seen.—C. L. 
Ferrick. 
THE CoxaL GLANDS OF ARACHNIDA AND CrRusTAceA.—lIn this 
