178 



of the penultimate pair considerably greater in breadth than in length, and 

 having the anterior edge angularly bent in the middle. Last pair of pereiopoda 

 with the basal joint exceeding in length the remaining part of the leg, 

 posterior expansion rather broad and obtusely truncated at the tip, ischial joint 

 comparatively large and stout, propodal joint shorter than the 2 preceding 

 joints combined, and oblong in form, dactylns broadly lanceolate, and exceeding- 

 its half length. Last pair of nropoda with the rami scarcely twice as long as 

 the basal part, and only fringed with simple spiniform bristles. Telson oblong, 

 about twice as long as it is broad, slightly tapering in its outer part, with 2 

 pairs of dorsal denticles, tip blunted. Colour not yet stated. Length of adult 

 female 11 mm. 



Remarks. The present species, at first detected by Bruzelius on the 

 Bohuslan coast, is chiefly distinguished from those previously described, by 

 the nearly equal-sized antennae, a characteristic which gave rise to the specific 

 name. It is, moreover, characterised by the unusually short and robust form 

 of the antepenultimate and penultimate pairs of pereiopoda, as also by the 

 less produced frontal part of the cephalon. 



Occurrence. The species would seem to occur along the whole south 

 and west coasts of Norway, and northwards up to the Lofoten Isles, in depths 

 varying from 50 to 200 fathoms. In some places, it may be found in great 

 abundance, thus in the Christianiafjord at Drobak, from which locality Prof. 

 Loven, long ago, brought home a vast number of specimens. 



Distribution. - British Isles (Norman), Shetland Isles (the same author), 

 Bohuslan (Bruzelius). 



11. Ampelisca anomala, (1. 0. Sars. 



(PI. 62, fig. 2). 

 Ampelisca anomala, G. O. Sars, Oversigt af Norges Crnstaeocr I, p. 108, PL 6, fig. 2. 



Cephalon about the length of the 3 anterior segments of mesosome 

 combined, frontal part gradually tapering distally, with the tip transversely 

 truncated and rather deeply emarginated in the middle, inferior corner acutely 

 produced. First pair of coxal plates rather expanded distally, and obliquely 

 rounded at the tip, without, however, as in most other species, concealing the 

 basal part of the inferior antennae; 4th pair nearly as broad as deep, with 

 the inferior edge longer than the posterior. Last pair of epimeral plates of 

 metasome rectangular. First segment of urosome having dorsally a distinct 

 carina terminating in a sharp corner. Corneal lenses unusually large, 

 though less refractive than in most other species, the lower pair placed on 

 the sides of the cephalon at some distance both from the inferior edge, and 



