360 



below, its edge .smooth and slightly curved, having on each side 3 small 

 spines. Posterior gnathopoda much more powerful than the anterior, though 

 scarcely longer, carpus comparatively short and produced inferiorly to a 

 narrowly rounded setous lobe, propodos very strong, nearly as long as the 

 basal joint, and oblong oval in form, slightly widening distally, palm 

 much shorter than the hind margin and well defined below, its edge somewhat 

 flexuous, and armed in its lower part on each side with 3 very coarse spines, 

 dactylus comparatively short, but rather strong. Pereiopoda, especially the 

 3 posterior pairs, much more strongly built than in P. glaber, basal joint of 

 the latter pairs rather large, oval, with the posterior edge smooth. Last 

 pair of uropoda with the inner ramus exceeding the outer by about YS of its 

 length, both exhibiting a smaller number of marginal spines than in the pre- 

 ceding species. Telson rather small, and pronouncedly navicular in form, tip 

 obtusely pointed. Body whitish, everywhere ornamented with small pinkish 

 pigmentary spots. Length of adult female 7 mm. 



Bemarks. I first referred this form to the genus Ampliitliopsis of 

 Boeck, not being at that time aware of the fact, that this genus, in the sense 

 in wich Boeck gave it, is a most collective one, including, as it does, at least 3 

 different genera, not even belonging to the same family. That the present form 

 ought to be ranged within the family PranipJtithoidte, is unquestionable, and 

 I think it will find its proper place in the genus Parapleustes, occupying, as 

 it does, in some points, an intermediate position between the 2 other species 

 included in this genus. From P. glaler it is easily distinguishable, by the 

 want of any spiniform projection on the basal joint of the superior antennae, 

 as also by the structure of the gnathopoda, in which latter respect it somewhat 

 approaches the succeeding species. The specific name refers to the peculiar 

 and beautiful colouring of the body. 



Occurrence. Off the coast of Norway, I have hitherto only met 

 with this form in a single ]ocality, viz., Buge in the Varangerfjord, where a 

 few specimens were collected from a depth of 50 100 fathoms. 



Distribution. Spitsbergen and Iceland (Norw. North Atl. Expedi- 

 tion), Greenland (Hansen). 



12. Parapleustes latipes (M. Sars). 



(PI. 127), 



AmpMthoe Jntijit^, M. Sars, Forh, Vid- Selek. Christiania 1858, p. 139. 

 Syn. : Calliope Fiugalli, Sp. Bate (adult). 

 Calliope Ossiani, Sp. Bate (juv.) r 

 Amphithopsis latipes, Boeck, 



Body very strongly built, with the segments sharply defined from 

 each other, those of metasome and the last one of mesosome elevated at the 



