89 



tlie ventral side, particularly outside a line between the base of the antennuliP and the first 

 pair of trunk-legs, with peculiar, irregular stripes or with keels and knots. 



OVISACS. Real ovisacs are not found; the eggs are laid in one free lump or in 

 two (or three) lumps. 



LARVA. Is only known of one species. Antennae about the length of the anten- 

 nulae. The maxillulae have a short but distinct basal pai't and two stout branches, the anterior 

 of which is very long. The maxillipeds are situated closely behind the 3-jointed maxillae; 

 all joints of both pairs are smooth. The peduncle of the natatory legs is very broad. 

 The third segment of the abdomen, together with the broad caudal stylets, which are not 

 set off by an ai-ticulation, is almost as broad as and neaily double the length of the second 

 segment. The longest seta of the caudal stylets is only a little longer than the abdomen 

 and not nearly half the length of the cephalothorax. 



POST-LARVAL DEVELOPMENT. Unknown. 



HABITAT. The two species known live each in a species of the genera Mdopa 

 Boeck aud Stoiofhoe Dana. Hitherto found only in Norway and at the western coast of 

 Greenland. 



REMARKS. My material of the Amphipod family of Stenothoidae, which contains 

 a great multitude of species, being somewhat limited, because I have only seen a few spe- 

 cimens of most Greenlandish and Danish species, it may be expected that researches made 

 in a large material will lead to the discovery of a number of new species of this intei- 

 esting genus. 



Conspectus of the Species. 



The basal joint of the maxillipeds in both sexes conspicuously longer than that of 

 the maxilhv. The female without median frontal pi'ocess. The male elongated. 



1. St. egregins n. sp. 

 The basal joint of the maxillipeds in both sexes almost shoiter than that (jf the 

 maxillae. The female has a median frontal process. The male is short and broad. 



2. Sf. Sarsii n. sp. 



I. Stenothocheres egregius n. sp. 



(PI. I, tig. la— U.) 



FEMALE. A very large specimen is 63 mm. long. The specimen represented 

 (fig. 1 a and fig. 1 b) is ab. 59 mm. long and -46 mm. broad. The body as a rule a little 

 longer than broad, apart from the abdomen evenly rounded; seen laterally (fig. 1 b), the ventral 

 side is rather flat, the back strongly convex. No median frontal process between the bases 

 of the antennulae. The antennae distinctly jointed ; the terminal joint furnished with two short 

 setae of unequal length. The basal joint of the maxillipeds conspicuously longer than that of the 



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