55 



and cleft almost to the base. Colour yellowish, with dark browii intestine 

 and without distinct pigmentary spots. Length of adult female S'/a mm. 



Remarks. — Although very closely related to the preceding spei.'ies, 

 this form may be readily distinguished, not only by its inferior size, but by 

 the dift'erent proportions of the joints of the several legs and by its uniform 

 yellowish colour. 



Occurrence. — The only locality iii which I have hitlierto met with 

 this species i.s at Bejan, at the entrance of the Trondhjemsfjord. It occurred 

 here not rarely in a depth of 30 — 40 fathoms. According to Bruzelius it has 

 also been found on the coast of Finmark. 



Distribution. — Coast of Bohuslan (Bi-uzelius). 



Gen. 13. Hippomedon, Boeck 1870. 



Body slender and compres.sed, with rather deep though narrow coxal 

 plates. Anterior part of mesosorae (comprising the 4 anterior segments) 

 scarcely as long as the posterior part. Metasome powerfully developed, with 

 lai'ge epimeral jjlates, those of the last paii" terminating with a sharp upturned 

 hook-like projection. Cephalon comparatively small; eyes imperfectly developed. 

 Superior antennae with the joints of the peduncle more or less produced at 

 the end anteriorly, fiagellum of moderate size with the 1st joint very 

 large, accessory appendage comparatively small. Liferior antennae much 

 longer than the superior; fiagellum in both sexes, but especially in the male, 

 very slender and comjiosed of numerous articulations; flagella of lioth pairs 

 of antennae in male provided with distinct calceolae. Epistome not at all 

 projecting. Anterior lip rather small and roirnded in front. Posterior lip 

 strongly chitinized, with short and blunt lateral corners. Mandibles short 

 and strong, with the molar expansion rather large and massive, truncated at 

 the ti]i, pal]) very elongated and originating nearer the end of the mandible 

 than does the latter. First pair of maxillae with the masticatory lobe strongly 

 incurved and only armed with a limited number of denticiilated spines, tlie basal 

 lobe short and oval, with 2 curved plumose setae at the tip ; palp with the terminal 

 joint gradually expanded distallj^ and armed at the obliquely truncated tip 

 with a dense series of short spines. Second i)air of maxillae with the lobes 

 short and broad, the inner one setous both at the tip and the inner edge. 

 Maxillipeds comparatively short, masticatory lobe large, witli the inner edge 

 straight and armed with a dense row of blunt denticles; palp robust, only 



