of the North Atlantic and of North-Western Europe. 649 



the supero-posteal corner is less abruptly rounded and more sloped away, and the 

 infero-posteal portion is slightly produced in lip-like form. The eyes are con- 

 siderably larger than in the female. The antennules terminate in four long 

 primary setse (PL lx., fig. 19), though very generally one or more of these have 

 been broken ofi near the base, and exhibit signs of reproduction; the lowest 

 setse and the second from above exhibit marked characteristics ; they are bulbously 

 swoollen at the base, and from this bulb is given off a lobe with acute termination ; 

 to the side of this lobe is attached a remarkable saucer-shaped organ (fig. 20) of 

 considerable size, and above a second in a rudimentary state; the setae them- 

 selves at varied intervals send out lateral long processes which run side by side 

 with the setse at first, but ultimately diverge ; two or three of these processes 

 (fig. 21) are furnished at their extremity with saucer-shaped organs, usually five 

 in number, of similar character to that of the basal lobe, but very much smaller. 



What purpose do these remarkable organs serve ? Their form, and the 

 circumstance that the setse which bear them are so frequently broken off would 

 seem to favour the view that they are sucking disks used in grasping the female. 

 On the other hand it is possible that their function may be similar to that of 

 the calceolse which are so frequently characteristic of the antennules and antennse 

 in the males of the amphipoda. The antennse in all respects resemble those of 

 the female. The copulatory apparatus consists of two ovate lobes. 



Habitat. — Only a single specimen of this species is known from British 

 seas ; it was dredged by A, M. N. off the Unst Haaf, Shetland, in 1867. 



Distribution. — Kloster Fjord and Stoksund, both in the Hardanger Fjord, 

 100-126 fathoms; Floro ; Trondhjem Fjord, 150-300 fathoms (A. M. N.). 

 Lofoten Islands, 300 fathoms (G. 0. Sars). The type specimen was also dredged 

 on the coast of Norway by the late R. M'Andrew. 



2. Cypridina megalops (G. 0. Sars). 



(PI. Liv., figs. 5, 6.) 



1871. Cypridina megalops, . Saes,G.O., "UndersogelserHardangerfjordens Fauna 



1. Crustacea," Vidensk.-Selsk. Forhand, p. 278. 



Female, very like C. norvegica, but not so large, shorter and higher in pro- 

 portion, the greatest height, instead of being central, is a little behind the middle, 

 and the shell is higher behind than in front* ; ventral margin equally arched 

 throughout ; dorsal moderately convex in the centre, less so in front, and more so 



* In C. norvegka $ the two ends are of sub-equal heiglit, and in the $ of that species the anterio 

 portion is higher than the posterior. 



