368 DE. H. J. HANSEN ON THE 



Epimera of the thoracic segments with the posterior angle 

 sharp, at least on the posterior pairs, but none of them produced 

 into processes. 



Seventh thoracic legs rather broad ; fourth joint somewhat 

 longer than broad and rather shorter than the fifth ; both these 

 joints on the lower surface with in all a few strong spines 

 at some distance from the inner margin, and no spiues but a 

 number of setae near the outer margin. 



Last abdominal segment has on its upper surface a moderately 

 deep and rather broad transverse impression, the anterior margin 

 of which is a little convex, while its ends are distinctly conneeteil 

 with good-sized sublateral impressions ; from the inner end of 

 each of these a longitudinal impression proceeds often forwards. 

 Hind margin slightly longer than one-third of the breadth of the 

 segment, at each end limited by a distinct but short tooth ; ihe 

 margin is somewhat convex, not distinctly serrate, armed with 

 two pairs of movable spines, those on each half very distant 

 from each other. 



TJropoda rather large ; endopod, when directed parallel with 

 the axis of the animal, reaches considerably beyond the hind 

 margin of the abdomen. 



Length of an adult male 4 mm. ; of a female without marsupium 

 4*2 mm. 



Occurrence. — Of this species I have seen nearly 130 specimens 

 from six localities on the northern and western coasts of France, 

 viz., Carteret, on the western coast of Normandy ; St. Lu- 

 naire, near St. Malo (88 specimens) ; Belle-Isle, off: the south- 

 western coast of Brittany ; Poutaillac near Boyan, Charente- 

 luferieure ; Arcachon ; finally, Heudaye, near the Spanish 

 frontier. One specimen was labelled 35-60 m.; the numerous 

 specimens from St. Lunaire and a specimen from Hendaye were 

 taken swimming in puddles on the beach. 



Memarhs. — The species is easily distinguished from all other 

 forms, E. inermis excepted, by the absence of processes on all 

 thoracic epimera ; from the last-named species it is easily 

 separated by the length, shape, and armature of the posterior 

 margin of abdomen. It is closely allied to E. pulchra, and has 

 probably sometimes been referred to that species. — Fig. 2 k 

 (PL 35) shows the " appendix masculiua " of second pleopod ; it 

 is comparatively broader than in E. pulchra, but its terminal 

 portion is shaped nearly as in that species. 



