S 6 DISCOVERY REPORTS 



Distribution. E. grimaldii was taken at twenty-two stations by the ships of the Discovery Investi- 

 gations. At nine of these it was taken with E. unguiculata and at nine with australis, while at three 

 stations the three species were taken together. It would thus appear that there is very little difference 

 between its distribution and that of the other two species. Many records of E. unguiculata, made 

 before Nouvel separated grimaldii from it in 1942 (1942a, pp. 5-8), refer in all probability to the 

 latter species and it is not possible to define its geographical distribution accurately until all this earlier 

 material has been re-examined. From Nouvel's records of the extensive Monaco material and from 

 the present records, it is evident that E. grimaldii is widely distributed in the tropical and temperate 

 waters of the Atlantic and Indian Oceans, occurring less frequently as far south as the Scotia Sea. 

 Nouvel records that it does not occur in the Mediterranean, although E. unguiculata has been taken 

 there. Its vertical distribution is similar to that of unguiculata. The greatest depth at which it occurs 

 in the Discovery Collection was between 2450 m. and 2580 m. at station 101 and the shallowest water 

 in which it was captured was from 850 m. to 950 m. at the same station. 



Eucopia linguicauda sp.n. 



Occurrence: ^ l %' ' 



St. 413. 21. viii. 30 (day). Open ocean, west of Saldanha Bay, 1600-1000 m., 1 imm. $, 41 mm. Type. 



Description. Carapace extremely soft and transparent ; anterior margin convex, evenly rounded ; 

 antero-lateral angles bluntly pointed and well produced (Fig. 6 A). Anterior region of head produced 

 to beyond half the length of the eyes. Antennular peduncle robust with the first segment longer than 

 the second and third together and very broad ; second segment triangular in dorsal view with its distal 

 margin markedly oblique ; third segment with inner margin only slightly concave with the inner distal 

 angle produced forward into a large, well-developed setiferous lobe; distal margin considerably shorter 

 than the inner margin; proximal margin oblique (Fig. 6 A). Antennular peduncle small, less than half as 

 long as the scale ; scale short and broad, only slightly longer than the antennular peduncle ; more than 

 twice as long as broad at its broadest point ; outer margin somewhat sinuous. Both scales are damaged 

 in the only specimen available, but in one there appears to be a trace of a small spine or tooth at 

 the distal end of the outer margin. Distal segment asymmetrical; slightly less than half as long as 

 broad at its base (Fig. 6 A). Eyes more than twice as long as broad; cornea large, occupying the 

 whole of the distal region of the organ; small ocular papilla present on the inner distal margin of the 

 eyestalk. This papilla is very difficult to see as it is slender and small and only reaches to one-third 

 of the length of the cornea (Fig. 6 A). Mandibles of the type usual in the genus, but with particularly 

 slender palps. Maxillule and maxilla as in other species of the genus (Fig. 6B, C). First thoracic 

 appendage with very large epipod and of the same form as in other species of the genus (Fig. 6D). 

 Second to fourth thoracic appendages very long and strong, especially the third and fourth; carpo- 

 propodus of the fourth pair robust ; inner margin with deep emargination one-third from its proximal 

 end; dactylus and nail one-third as long as the carpo-propodus (Figs. 6E, F). The inner margin of 

 the emargination is armed with about twenty short peculiar spines (Fig. 6G). Uropod exopod longer 

 than the telson; terminal segment slightly shorter than broad at the base; only one spine at distal 

 end of outer margin of first segment, but the specimen is damaged and there appears to be the scar 

 of a second spine which has been lost. Only one exopod has the terminal segment present and both 

 endopods are broken (Fig. 6H). Telson broad and linguiform with the apex broadly and evenly 

 rounded ; no trace of sculpturing on dorsal surface, but the whole telson is hollowed from above like 

 a trowel; lateral margins unarmed distally for nearly half their length, then armed with many small 

 spines which become more crowded towards the apex. These spines appear to be of two kinds. Some of 



