291 



Gen. 2. ParCBdicerOS, G. O. Sars, n. 

 Syn. : Gidiceros, autoruni (part). 



Form of body about as in (Ediceros. Cephalon with the frontal pai-t 

 considerably produced, but without forming any distinct rostrum, its extre- 

 mity being more or less swollen to receive the contiguous eyes. Coxal plates 

 of moderate size, the anterior pairs quadi'angular in form. Antennae very 

 unequal, the superior ones being comparatively very small, the inferior, on 

 the other hand, rather elongated, with the flagellum in the adult male long 

 and filiform. Oral parts much as in CEdiceros, saving that the mandibular 

 palp is more slender, and the anterior lip nearly transversely truncated at 

 the tip. Gnathopiida rather unequal in structure, the anterior ones having 

 the basal joint more or less dilated, and the 3 succeeding joints very small, 

 with the carpal process obsolete, propodos much elongated and somewhat 

 expanded in its outer part, with the palmar edge obliquely curved, and 

 densely clothed with small spinules and bristles. Posterior gnathopoda about 

 as in (Ediceros. Pereiopoda more slender than in the latter genus, otherwise 

 of much the same structure. Uropoda and telson likewise of a very similar 

 appearance to those in that genus. 



Bfniarls. — The value of this new genus may perhaps be questioned, 

 since there is no essential difference to be found in the structure of the oral 

 parts from that in (Ediceros. On the other hand, the want of a true rostrum, 

 and especially the rather peculiar structure of the anterior gnathopoda, are 

 characteristics, by which this genus is very markedly distinguished from 

 ffidiceros, and, as there are several species which perfectly agree in these 

 characteristics, the establishment of the genus may at least be regarded as 

 very convenient. Besides the 2 Norwegian species described in the sequel, 

 the form characterised and figured by the author from the Norwegian North 

 Atlantic Expedition as (Edm^os macrocheir undoubtedly belongs to the present 

 genus, and this is also the case with the species recently described by Dr. 

 Hansen from Greenland as CEdiceros curvirostris. Finally the latter author 

 records a form from the Kara Sea, which he only suggest refering to CE. 

 microps G. 0. Sars (= Parccdiceros propinqvus Goes), but whicli markedly 

 differs by the greater length of the propodos of the anterior gnathopoda, and 

 therefore properly ought to be regarded as specifically distinct. We thus have 

 no less than .5 species, all of whicli exhibit the very same essential charac- 

 teristics distinguishing them from the 2 above described species belonging to 

 the true genus (Ediceros. 



