DERCOTHOE (CERAPUS $ ). 
459 
AMP HIP OD A. 
NATAT0R1A. 
PODO CERI DES. 
Genus— DERCOTHOE (CERAPUS ?). 
Dercothoe. Dana, United States’ Explor. Exped. p. 968. 
Dercothoe ( Cerapus $). Spence Bate, Cat. Ampin p. 259. 
Generic character. Eyes situated on very advanced lobes. 
Superior antennae furnished with a small secondary appendage. 
Coxae moderately deep. Posterior pair of pleopoda single- 
branched. Telson armed with several rows of small tooth-like 
processes. 
The eyes are situated on advanced lateral lobes. The 
antennae are nearly of the same length ; the superior 
pair furnished with a small secondary appendage. The 
coxae are moderately deep. The first pair of hands are 
small ; the second large, having the wrist produced along 
the inferior margin of the hand. In all other respects 
the animals that constitute this genus closely resemble 
those of the males of Cerapus . 
The absence of positive evidence alone precludes us 
from suppressing this genus founded by Dana. We 
have little doubt but that the animals of which it con- 
sists are the females of Cerapus . But since we have 
not been able yet to determine with certainty the males 
of certain species, and from Dana having described one 
of his as having a secondary appendage to the superior 
antennae that consists of three or four articuli, we think 
it both desirable and convenient to retain it for the 
present. 
Kroyer — writing upon the genus Ericthonius } of Ed- 
wards,* which we consider to be a synonym of Cerapus— 
* Nat. Tidsk. iv. p. 163. 
