DERCOTIIOE (CERAPUS $ ). 459 



A M PHI POD A . PODOCERIDES. 



NA.TATOR1A. 



Genus DERCOTHOE (CERAPUS $). 



Dercotkoe. DANA, United States' Explor. Exped. p. 968. 



Dercothoe (Cerapus $). SPENCE BATE, Cat. Amph. 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. 



Krb'yer writing upon the genus Ericthonius, of Ed- 

 wards,* which we consider to be a synonym of Cerapus 



* Nat. Tidsk. iv, p. 163. 



