238 



length of the last peduncular joint. Anterior gnathopoda of same structure 

 as in the said species, except that the propodos appears a little smaller. 

 Posterior gnathopoda in female comparatively larger than in the type 

 species, propodos more elongated, and somewhat resembling that of the adult 

 male of S. marina, palm coarsely dentated and extending nearly to the base, 

 being defined posteriorly by a very slight prominence armed with 2 strong 

 spinules. Pereiopoda very like those in the preceding species, though the 

 basal joint of the 2 last pairs appears comparatively somewhat larger. Last 

 pair of uropoda with the basal joint somewhat longer than the other 2 

 combined, and armed with 8 denticles. Telson comparative!}' broader than 

 in the type species, and armed with 4 pairs of dorsal denticles. Body highly 

 pellucid, of whitish colour, with a few scattered reddish patches; ova in 

 the marsupial pouch very numerous and small, and of a light bluish grey 

 hue. Length of adult female 8V2 mm. 



RemcD'ls. — The above described form is so very nearly related to 

 S. marina-, that I have long regarded it only as a large variety of that 

 species. On a closer anatomical examination, I have, however,* found some 

 apparently constant differences between the two forms, and prefer therefore, 

 at present, to keep them specifically distinct. Thus, the very small eyes 

 with their imperfectlj'-developed visual elements, the comparatively shorter 

 and less unequal antennae, and the somewhat diff'erent form of the posterior 

 gnathopoda, will serve for distinguishing the present species from S. marina. 



Occurrence. — As the species was formerly confounded with ^S'. marina. 

 I am at present unable to state with certainity the places where it occuri'ed, 

 bi^t believe them to have belonged either to the south or the west coast of 

 Norway, or most probably to both these tracts. As far as I remember, 

 the specimens were procured from a rather considerable depth, ranging to 

 nearly 100 fathoms. 



Dii^lfiJiidion. — North Sea, outside the great fishing banks (Stockholm 

 Museum). 



3. Stenothoe tenella, Gr. 0. Sars. 



(PI. 81, fig. 2). 

 Stenothoe tenella, G O. Sars, Overs, af Norges Crustaceer I, p. 88, PI. 3. fig. 12. 



Form of body considerably more slender than in the 2 preceding 

 species. Cephalon somewhat produced in front between the bases of the 

 superior antennae, lateral corners distinctly angular at the tip. Second pair 

 of coxal plates rather broad, anterior edge boldly curved, posterior straight. 



