295 



which latter have the carpal process very narrow and stretching along the 

 propodos. Pereiopoda, uropoda and telson nearly as in the 2 preceding genera. 

 Bemarls. — This genus, established by Stimpson, is nearly allied to 

 the 2 preceding ones, though materially differing in the structure of the 

 mandibles, as also in that of the gnathopoda. It comprises numerous species, 

 the greater number of which would seem to be restricted to the northern Oceans. 

 In the following pages will be described no less than 12 Norwegian species, 

 2 of which are new to science. In addition to these, other species have been 

 recorded from the east coast of Nortli America (Stimpson), from Greenland 

 (Hansen), and from the British Isles (Norman). 



5. Monoculodes carinatus, >Sp. Bate. 



(PL 106). 



Monoculodes carinatus, Sp. Bate, Catal. Amph. Brit. Mus. p. 104, PI. XVII, fig. 2. 

 Syn : Monoculodes Stiuipsonii, Sp. Bate. 

 ,, ffidiceros affinis, Bruzelius (not Goes). 

 ,, Monoculodes affiuis. Boeck. 



Body somewhat robust, and rather tumid in its anterior part, with the 

 segments sharply defined, those of metasome distinctly carinated dorsally. 

 Cephalon nearly as long as the first 3 segments of mesosome combined, frontal 

 part strongly vaulted anteriorly, and produced to a compartively short curved 

 rostrum, not quite reaching to the end of the basal joint of the superior 

 antennse. First pair of coxal plates rather expanded distally, and broader 

 than the 2 succeeding pairs; 4th pair deeper than the corresponding segment, 

 terminal edge strongly curved in the middle, infero-posteal corners but little 

 produced; 5th pair somewhat less deep than the 4th, but much broader, espe- 

 cially in the female. Eyes very large, elliptical in form, and filling up the 

 greater part of tlie front, pigment purplish with a yellowish coating. Supe- 

 rior antennae in female about the length of the cephalon and the first 2 seg- 

 ments of mesosome combined, and somewhat shorter than the peduncle of the 

 inferior ones, 1st joint of the peduncle about the length of the 2nd, but con- 

 sidei-ably thicker, flagellum much shorter than the peduncle, and composed of 

 8 articulations only; those of adult male having the 2nd joint of the peduncle 

 much shorter than in female, whereas the flagellum is more strongly developed, 

 and thickened at the base, with some of the joints densely clothed with sensorj^ 

 bristles. Inferior antennae in female nearly twice as long as the superior ones, 

 last joint of the peduncle very elongated and slender, equalling in length 

 the 3 preceding joints combined, flagellum about as long as the 2 last joints 



