364 DE. H. J. HANSEN ON THE 



into a rather small, yet very conspicuous process : epimera of 

 sixth segment produced into rather long processes, much longer 

 than those of seventh epimera. 



Seventh thoracic legs slender ; fourth joint much longer than 

 broad, a little shorter than the fifth ; fourth joint with one or 

 two spines ; fifth joint with one spine on the lower surface rather 

 removed from the inner margin. 



Last abdominal segment has on its upper surface a transverse 

 broad impression, often' connected at each end with a faint 

 transverse sublateral impression. Posterior margin about one- 

 third as long as the breadth of the segment, distinctly convex, 

 finely serrate, without movable spines, at each end with a con- 

 spicuous or even rather large triangular tooth, and at the outer 

 base of this tooth another very small tooth or minute projecting 

 angle. 



Length of an adult male from Naples 4-2 mm.,: of a female 

 without marsupium from Shetland 72 mm. 



Occurrence. — Norman's type specimen was dredged by him in 

 St. Magnus Bay, Shetland, 40-60 fathoms (a specimen from this 

 locality has been examined by me, from which my two figures 

 are taken) ; many years after it was obtained in lat. 59° 28' N., 

 long. 6° 33' W., 53 fathoms (Norman). In material from Mr. 

 Dollfus I found two specimens captured near Concarneau, 

 south-western coast of Brittany, 50-60 m. ; one specimen near 

 Belle-Isle; numerous not half-grown specimens from La Banche, 

 France, 17 m., and three specimens from the coast of Morocco, 

 180 m. The male described by me in 1895 was secured at Naples. 

 Lo Bianco (Mitt. Zool. Stat. Neap, xxiii. p. 196) records two 

 specimens obtained by Mr. P. A. Krupp in the Mediterranean, 

 in the open sea, at two stations some miles from Capri. The 

 species is probably always pelagic. 



ItemarJcs. — Adult specimens of this species are easily dis- 

 tinguished from all other forms by the flagellum of the antennulse 

 and by the hind margin of abdomen, where the existence of a 

 minute tooth or sharp angle outside a rather large tooth is very 

 characteristic. The epimera are very similar to those of E. pul- 

 clira, but in the latter species the fifth epimera are without real 

 processes. In half-grown or still smaller specimens the structure 

 described of the angles at the posterior margin of abdomen is 

 often obscure, but they can be recognized with certainty by the 

 small process from clypeus, by antennulse and epimera. At least 



