417 



fascicles of delicate bristles, accessory appendage extremely small, scarcely 

 attaining the length of the last peduncular joint. Inferior antennae consider- 

 ably shorter than the superior, the last 2 joints of the peduncle nearly 

 equal-sized, flagellum scarcely attaining the length of those joints combined. 

 Gnathopoda comparatively strongly built, carpal lobe rather prominent, 

 propodos but little broader than it is long, and rounded quadrangular in form, 

 palm very .slightly arched, dactylus comparatively strong. Pereiopoda more 

 robust than in the other known species, and densely edged with fascicles of 

 short spines, basal joint of last pair not nearly twice as long as it is broad 

 at the base, posterior edge strongly curved in its upper part and, as in the 

 2 preceding pairs, finely serrated, dactylus in all pairs rather strong. Last 

 pair of uropoda with the inner ramus somewhat longer than the outer. Telson 

 quite unarmed and very large, reaching nearly to the tip of the last pair of 

 xxropoda, outer part slightly tapering and divided at the tip into 2 diverging 

 acuminate lappets, cleft very narrow, firsure-like, and extending about to the 

 middle of the telson. Colour, according to the statement of Boeck, yellowish 

 white, changing into reddish. Length of adult female 24 mm. 



Bemarls. — This is the species first detected, and ought therefore 

 to be regarded as the type of the genus It is easily distinguished from the 

 other species by its comparativelj^ strongly built body and appendages, and 

 by the very distinct carina running along the posterior part of the back. 

 It also grows to a larger size than most of the other species. 



Occurrence. — 1 have myself only found a single specimen of this 

 form, that here figured, which was collected, many years ago, at Vardo, east 

 Finmark, from a depth of 20 — 30 fathoms. Also Boeck records it from the 

 Norwegian coast, but his statement about its occurrence as far south as 

 Kattegat, must be founded upon some error. 



Distribution. — Grreenland (Kroyer), Spitsbergen (Goes). 



2. Eusirus propinqvus, G. 0. Sars, n. sp. 



(.'1. 147, fig. 1). 



Body comparatively^ more slender than in the type species, and having 

 the dorsal carina nut nearly so distinct. Last segment of mesosome very 

 slightly elevated at the posterior edge dorsally ; the 2 anterior segments of 

 metasome each with a well-marked, posteriorly-pointing, dorsal projection. 

 Cephalon about as in E. cmpidatus, except that the lateral corners are nearly 

 transversely ti'uncated at the tip. First pair of coxal plates rather expanded 

 distally, anterior corner narrowly rounded, posterior one with a single small 



