435 



in that form, cleft. It would thus seem that both forms are not even 

 congeneric. Most of the specimens collected have the appearance of being 

 still immature; but I have a single apparently adult female specimen, found 

 at Bode, and measuring in length 14 mm., in which, however, most of the 

 appendages are broken, but which otherwise fully agrees with the other 

 specimens. 



Occurrence. — I have met with this form occasionally both off the 

 west coast of Norway and in the Trondhjemsfjord, as also along the Nord- 

 land coast as far north as Hasvig, west Finmark. It occurred, in every 

 instance, in a very considerable depth, ranging from 100 to 300 fathoms. 

 Owing to the great brittleness of the appendages, it is rather seldom to get 

 a specimen (juite uninjured, and I have therefore been obliged to give a 

 figure of a comparatively small specimen, in which all the appendages still 

 remained. Out of Norway this form has not yet been recorded. 



Gen. 2. Halirages, Boeck, 1870. 



Syn.: Parampliithoe, Goes (part). 

 > Pherusa, Stimpson. 



Body slender and elongated, with some of the segments produced 

 dorsaJly to acute, posteriorly-pointing projections. Cephalon not very large, 

 lateral corners short and broad, postantennal ones of moderate size, and 

 acutely produced. Coxal plates comparatively small, 1st pair not expanded 

 distally. Both pairs of antennae greatly elongated, and carrying small calceolai 

 arranged in several rows; the superior ones having the last joint of the 

 peduncle produced inside to a thin lamellar expansion, but without any 

 accessory appendage. Anterior lip of the usual rounded form; posterior lip 

 without any inner lobes. Mandibles strongly developed, with the palp very 

 large, and the terminal joint greatly produced and somewhat curved. 

 Maxillae of the usual structure. Maxillipeds with the basal and masticatory 

 lobes well developed, palp large and robust. Gnathopoda small and feeble 

 in structure, with elongated carpus and rather narrow oblong propodos. the 

 palm of which is quite short. Pereiopoda slender, the 3 posterior pairs suc- 

 cessively increasing in length, and liaving the basal joint rather expanded. 

 Penultimate pair of uropoda rather small; last pair well developed, reaching 

 beyond the others, and having the rami subequal in size and narro\yly lan- 

 ceolate. Telson unarmed, outer part not incised. 



BemarJcs. — The genus is here taken in a more restricted sense than 

 was done by Boeck, who referred to it also the species of the next genus. From 



