511 



obtusely rounded apex. Pereiopoda of moderate length, basal joint of the 

 3 posterior pairs oval in form, with the hind edge distinctly serrated. Last 

 pair of uropoda about the length of the urosome, basal part somewhat 

 elongated, outer ramus oblong linear, with only two small fascicles of spinules 

 on either edge, tip armed with a strong mncroniform spine accompanied 

 on either side with a few small spinules; inner ramus very small, scale-like. 

 Telson not nearly extending to the end of the basal part of the last pair of 

 uropoda, cleft very deep, and gradually widening distally, terminal lobes 

 conically pointed, and each having inside a few small spinules. Body, according 

 to Bruzelius, whitish with red spots, according to Boeck, with flexuous red 

 bands at the extremities of the segments, and across the legs. Length of 

 adiilt male scarcely attaining 6 mm. 



Remarks. This form also was first described by Montagu, and 



chiefly distinguished from the preceding species by the shape of tbe posterior 

 gnathopoda in the male. The Gammarus maculatus of Lilljeborg is, according 

 to Bruzelius, identical with the present species, and Mr. Norman has recently 

 pointed out that the Megamcera Alderi of Sp. Bate is only the female of 

 Melita obtusata. The same author is also inclined to regard M. proxima of 

 Sp. Bate and Gammarus podager of M.-Edw. as only varieties of the 

 present form. 



Occurrence. - I have met with this species occasionally off the south 

 coast of Norway in moderate depths. According to Boeck, it also occurs off 

 the west coast, at Haugesund, and in the neighbourhood of Bergen. 



Distribution. British Isles (Montagu), Bohuslan (Bruzelius), Kattegat 

 (Meinert), Dutch coast (Hoek), coast of France (Chevreux). 



16. Melita pellucida, G. 0. Sars. 



(PI. 180, fig. 2). 

 Melita pellucida, G. O. Sars, Oversigt af Norges Crustaceer, I, p. 106, PI. 5, fig. 9. 



Body rather slender and perfectly smooth, without any trace of 

 dentiform projections, the urosome having only a few simple bristles dorsally. 

 Cephalon about the length of the first 2 segments of mesosome combined, 

 lateral corners somewhat projecting and evenly rounded, postantennal corners 

 distinct. Anterior pairs of coxal plates nearly twice as deep as the corres- 

 ponding segments; 1st pair somewhat expanded distally; 4th pair distinctly 

 emarginated posteriorly in their upper part, and having the posterior expansion 

 truncated. Last pair of epimeral plates of metasome but slightly produced 



