SYSTEMATIC REPORT 51 



with its small setiferous distal lobe, (iii) by the straighter outer margin of the antennal scale, and 

 (iv) by the armature of the telson. In addition, the apex of the antennal scale is, as a rule, more 

 rounded than in grimaldii and is almost symmetrical (cf. Figs. 4 A and 5 A). 



The form of the telson is one of the easiest methods of recognizing this species. The spines arming 

 the distal portion of the lateral margins are arranged in a series of a few very long spines with a varying 

 number of small spines in the spaces between them. These small spines are sub-equal in size and the 

 number in the distal space varies between 8 and 24. In grimaldii, the smaller spines are not very 

 much shorter than the long spines and there are rarely more than three or four of them in the distal 

 space (Figs. 4B and 5B). 



Fig. 4. Eucopia ungniculata (W.-Suhm) (A, B). A, anterior end of male in dorsal view, x 6; B, telson and right uropod in 

 dorsal view, x 6. 



Eucopia australis Dana (C, D). C, anterior end of male in dorsal view, x 6 ; D, telson and right uropod in dorsal view, x 6. 



Distribution. I think that in all probability the specimen described by Dana as E. australis was 

 really E. unguiculata and it is certain that a re-examination of the material, which in the past has been 

 referred to various species of the genus Eucopia, would reveal that in many cases the animals have not 

 been correctly assigned. Nouvel showed that specimens previously referred to unguiculata can be 

 separated into two distinct species, unguiculata and grimaldii. I have myself confirmed his observa- 

 tions by an examination of the material labelled E. unguiculata in my late husband's collections from 

 the waters of the North Atlantic. It is therefore not possible to accept early records as reliable guides 

 for the geographical distribution of this species. On the other hand the distribution of the three 

 species unguiculata, australis and grimaldii seems to be very much the same. In the Discovery collec- 



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