196 



superior ones not attaining even the length of the cephalon and the first 2 

 segments of mesosome combined, and having the 2nd joint but little longer 

 than the 1st; last joint of the peduncle of the inferior ones shorter than the 

 penultimate. Grnathopoda with the propodos comparatively shorter than in 

 H. aetosa, and in both pairs oblong oval in form. Last pair of pereiopoda 

 rather large, basal joint oblong quadrangular, somewhat broader at the base, 

 the deliexed lobe rather broad, obtusely truncated at the tip, and scarcely 

 reaching beyond the ischial joint; outer part of the leg about as in H. setona. 

 Last pair of uropoda with the inner ramus scarcely shorter than tlie outer, 

 and provided, in addition to the setse, with 3 strong denticles. Telson rounded 

 oval in form, somewhat longer than it is broad at the base, cleft extending 

 nearly to the base, and in its outer part bordered with slender bristles. 

 Colour not yet stated. Length of the specimen examined IS) mm. 



llmiarlcs. — This new species is nearly allied to H. si-fo.sa, from which 

 it however differs, not only in its much larger size, but also in its more 

 robust form of body, in the evenly rounded lateral corners of the front, and 

 the much shorter and stouter antennte, and finally, in the non-produced last 

 pair of epimeral plates of metasome. It cannot be the H. Jrcfis of Hoeck 

 (= H. lineata Stuxberg), which species is much more nearly related to 

 //. inhicola, and, like this foi'm, wholly wants the dorsal fascicles of setae. 



Occurrence. — I have only seen a single specimen of this form, which 

 was collected by me, many years ago, off the coast of Finmark, but was at 

 that time erroneously regarded as a large specimen of H. setosa. 



Fam. 6. Stegocephalidae. 



Body short and robust, its anterior part being mucli tumified, and 

 having the back strongly deflexed in front. Cephalon short and deep, and 

 apt to be almost wholly withdrawn within the 1st segment of mesosome. 

 Anterior pairs of coxal plates generally rather deep, the 4th pair much 

 the largest, and sometimes greatly expanded, encompassing, as a rule, more 

 or less completely, tin; succeeding pair inferiorly. Metasome moderately strong, 

 with well developed e])imeral plates. Urosome short and stout. Antennae 

 short, nearly equal in length, and scarcely differing in the two sexes; the 

 .superior ones having a very small accessory appendage lying inside the 

 peduncle. Buccal mass greatly projecting. Anterior lip lamellar, bilobed 

 at the tip; posterior lip without any inner lobes, its lateral parts more or 



