KONGL. SV. VET. AKADEMIBNS HANDLINGAR. BAND. 22. - N:0 7. 117 



The form of the second pair of antennas in the female is peculiar to this genus. 

 They consist namely of two very short joints, the terminal the larger, almost globular 

 in shape. In the young female they are a little more conspicuous than in the adult one. 



The sexual dimorphismus is more strongly pronounced in Euiulopis than in the 

 other genera of the family. Except in the different form of the two pairs of antennas, 

 and in the broader pereeon of the female, it is also shown in the form of the last three pairs 

 of perseopoda — at least in Euiulopis Loveni — the femora of the female being less de- 

 veloped, and the tips of the legs transformed into a kind of subcheliform, grasping organ. 

 All the specimens of the two species, that I have examined, are taken swimming free in 

 the sea but this peculiar form of the tips of the last three pairs of peraeopoda makes it 

 probable that the female of Euiulopis, as well as the female of Hyperoche and Hyperia, 

 takes its abode within, or under, some larger marine animals, at least during the 

 breeding time. It is, however, a noticeable feature that in young females of Euiu- 

 lopis Loveni, taken at two different occasions, the tips of the last three pairs of peraao- 

 poda are exactly like those of the young and adult males (PI. VIII, fig. 14). This 

 feature seems to be contrary to the state in Hyperoche Martinezii (see above, p. 108) where 

 the young ones of both sexes have the tips of the last three pairs of legs formed as 

 similar grasping organs, and corroborates in some way the supposition that the adult fe- 

 male of Euiulopis for some time is hospiting in some marine animal. 



In general habitus Euiulopis comes near to Hyperoche and Hyperia, and is by this 

 reason placed between those two genera, forming an intermediate link between them also 

 by the form of the carpus of the first two pairs of perasopoda, alluded to above. 



Hitherto I know two species of the genus, easily to be distinguished from one 

 another. 



A. The lower hinder corner of the carpus of the first pair of peraeopoda, and the 

 apex of the carpal process of the second pair, are armed with a strong, terminal 



spine. The rami of the uropoda are narrow, elongate, fringed with hairs 1. E. Loveni. 



B. The lower hinder corner of the carpus of the first pair of pera?opoda, and the 

 apex of the carpal process of the second pair, without terminal spine. The rami 



of the uropoda are broadly lanceolate, without hairs, serrated 2. E. niirabilis. 



