SYSTEMATIC REPORT 125 



longer spines on the sternal processes; by the absence of serrulations beneath the setae of the inner 

 margin of the endopod of the uropod and by its smaller size. Adults of E. serrata measure 1 1 mm. 

 while females of E. ajricana of less than 4-2 mm. have well-developed brood sacs. A large number of 

 females of the same size have no brood lamellae, but the material is in bad condition and they have 

 probably been lost as have the thoracic endopods. 



Distribution. Off Cape Lopez, just south of the equator, West Africa. E. ajricana is the first 

 species of the genus to be recorded from the Atlantic south of the equator, the only other species from 

 the southern hemisphere being E. yongei Tattersall, from the Great Barrier Reef, Queensland. 



„ , . . .... Genus Echinomysis Illig, 1905 



1905 Echinomysis Illig, p. 151. 



Echinomysis chuni Illig, 1905 



1905 Echinomysis chuni Illig, p. 151, figs. 



191 2 Echinomysis chuni, Illig, pp. 129-38, 4 coloured plates. 



1930 Echinomysis chuni, Illig, p. 453, figs. 104-23. 



1939 Echinomysis chuni, Tattersall, p. 244. 



Occurrence : 



St. 673. 25. iv. 31 (night). West of Tristan da Cunha, 340-0 m., 2 juv. 



St. 1587. 3. v. 35 (night). South-east of Ras Hafun, 450-0 m., 1 9, 10 mm. 



Remarks. The single female specimen agrees very closely with Illig's description and figures in all 

 respects, except that the spines arming the carapace appear to be relatively longer than in his specimens. 



Distribution. This species was taken at eight stations by the 'Tiefsee' Expedition, one in the 

 Gulf of Guinea near Lagos and seven in the Indian Ocean — one off Sumatra, three off Ceylon, one off 

 the Amirante Islands, one south-east of Ras Hafun and one in the Gulf of Aden. W. M. Tattersall 

 (1939, p. 244) recorded a single female from the central Arabian Sea. The Discovery capture at 

 station 673 extends its known geographical range considerably to the southward. 



Genus Longithorax Illig, 1906 

 Longithorax capensis Zimmer, 19 14 



(Fig. 30A-F) 



1914 Longithorax capensis Zimmer, p. 392, pi. xxiv, figs. 20-4. 



1930 Longithorax capensis, Illig, p. 428. 



1943 Longithorax capensis, Nouvel, p. 75, figs. 1 19-122. 



Occurrence : 



St. 78. 12. vi. 26 (day). North-west of Tristan da Cunha, iooo(-o) m., 1 2, 10-2 mm. 



St. 89. 28. vi. 26 (day). Off Cape Town, iooo(-o) m., 1 <J, 10 mm., 1 juv. $, 3 99, 8-2-8-4 mm. 



St. 100. 2. x. 26 (day). West of Table Bay, 475(-o) m., 1 $, 9 mm., 1 ?, 9-8 mm. 



St. 100 C. 2. x. 26 (day). West of Table Bay, 450-550 m., 1 <J, 10 mm. 



St. 254. 21. vi. 27 (night). Midway between Tristan da Cunha and Cape Town, 20o(-o) m., 1 9, 8-8 mm. 



St. 258. 25. vi. 27 (night). West of Cape of Good Hope, 450-320 m., 1 9, 8-2 mm. 



St. 259. 26. vi. 27 (night). West of Cape of Good Hope, 450-370^) m., 1 juv. <J, 7 mm., 2 99, 1 adult 9-6 mm., 



1 juv. 8 mm. 

 St. 266. 21. vii. 27 (night). West of Orange River estuary, 20o(-o) m., 1 imm. <J, 7-4 mm. 

 St. 844. 8. iv. 32 (night). South of Cape Town, 155-0 m., 7 <£J, 12 99, 4 J uv -> largest io-o mm. 

 St. 1374. 24. v. 34 (night). East of St John's, Natal, 230-0 m., 1 adult 9, 9"4 mm. 

 St. 1586. 2. v. 35 (night). North-west of Seychelles, 550-0 m., 1 9 in two pieces. 



