169 



than twice as long as the peduncle, and composed of about 15 articulations. 

 Inferior antennae somewhat shorter than in A. ten-nicornis, the 2 last joints 

 of the peduncle equal-sized. (Inathopoda nearly exactly as in the last-named 

 species. Dactylus of the anterior pairs of pereiopoda longer than the 2 pre- 

 ceding joints combined. Last pair of pereiopoda with the basal joint about 

 the length of the remaining part of the leg, posterior expansion obliquely 

 rounded at the tip, and not reaching beyond the ischial joint, the latter about 

 as in the 2 preceding species, propodal joint oblong oval, and exceeding the 

 length of the 2 preceding joints combined, dactylus somewhat shorter. Last 

 pair of uropoda about as in A. tenuicornis. Telson somewhat less elongated, 

 without any dorsal denticles, but with from 4 to 5 marginal spinules on each 

 side. Colour not yet stated. Length of adult female 10 mm. 



RemarJcs. - - This species is nearly allied to A. fenwcornis, from which 

 it may, however, be readily distinguished by the somewhat more produced 

 cephalon, the greater length of the superior antennae, and by the obtusely 

 rounded last pair of epimeral plates of metasome, finally, by the comparatively 

 high and evenly rounded dorsal carina, on the 1st segment of urosome. 



Occurrence. I have met with this species in a few places off the 

 south and west coasts of Norway, in company with A. tenuicornis. Boeck 

 collected it at Haugesund, west coast of Norway, where I also have found it. 



Distribution. Bohuslan (Stockholm Museum). 



4. Ampelisca laevigata, Lilljeborg. 



(PI. 59, fig. 1). 



Ampelisca Icevigata, Lilljeborg, Ofvers. af Kgl. Vet, Akad. Forhandl. 1865, p. 123. 



Syn : Araneops brevicomis, Costa. 



Tetromatus bellianus, Sp. Bate. 



Cephalon nearly as long as the 3 anterior segments of mesosome com- 

 bined, frontal part somewhat curved downwards, and transversely truncated 

 at the tip, lower corner rather projecting. First pair of coxal plates obliqu.-l \ 

 expanded distally ; 4th pair much more deep than broad, lower edge straight, 

 and considerably shorter than the hind margin. Last pair of epimeral 

 plates of metasome produced at the lateral corners to a strong spiniform 

 projection, posterior edge deeply bi-sinuated, with a rounded projecting 

 lobe in the middle. First segment of urosome having at the end dorsal ly a 

 small hump-shaped projection. Corneal lenses small, but distinct, the lower 

 pair occupying the inferior corners of the front; underlying pigment dark- 

 brownish. Superior antennee in female extremely small, scarcely longer than 

 the cephalon, and not reaching beyond the penultimate peduncular joint of the 



22 Crustacea. 



