85G MRS. E. W. SEXTOX OX AMPHIPODA [Nov. 23, 



Genus Sympleustes Stebbing. 



Syn. 1860. Amjjhithopsis (part) Boeck (1), p. 661. 

 1893. Paraphustes^iii& (29), p. 357. 



1899. Sympleustes Stebbing (39), p. 209. 



1900. Dautzenbergia Chevreux (10), p. 73. 

 1906. Symjileustes Stebbing (40), p. 317, 



Two species of this genus were taken by the ' Huxley '■ — 

 ^S'. kitipes M. Sars, 3 specimens ; and *S'. yrmidimanus Chevreux, 

 5 specimens. 



Sympleustes latipes M. Sars, 



For synonymy see Stebbing (40), p. 317. 



Three specimens, measuring respectively 7'5 mm., 4-5 mm., and 

 2'5 mm. 



This species has been recoi'ded once before from the Bay of 

 Biscay, one specimen, an adult male, having been taken by the 

 'Caudan' Expedition of 1895. 



The ' Huxley' specimens are all young forms, the largest, 7'5 mm., 

 agreeing very closely with Sars's description and figures of the 

 adult (29. p. 360) ; the other two differing in degree only. 

 These latter have the palm margin of the second gnathopod 

 hand almost straight and the dorsal processes scarcely perceptible. 

 As Hansen pointed out (17. p. 135) the development of the 

 dorsal processes, and the emargination of the palm of the second 

 gnathopod are characters of maturity ; to these may be added 

 another character, taken from the epimeia of the 3rd pleon 

 segment : in the adult the postero-lateral corner is produced to an 

 obtuse angle, while in the young form it is deeply notched with a 

 setule inset. The accessory flagellum of the superior antenna, 

 fifst noted by Bonnier (4. p. 646) is well-developed in ail three 

 specimens. 



Distribution : — 

 Norway : M. Sars, as Amphithoe latipes (30. p. 139), Hammerfest 



and Tromso, 30-60 fms., on Hydroids ; largest, 13 mm. 

 A. Boeck, as Aniphithopsis kitipes (3. p. 355) : largest, 9 mm, 

 G. O. Sars, as Farapleustes latipes (29. p. 362), from Finmark 



to the Trondhjemsfjord : 30-100 fms., on Hydroids; 



largest, 12 mm. 

 Norman, as Farapleustes latijyes (23. p. 481), Lang Fjord : 



5-15 fms, 

 Greenland : Norman, as A7nphithopsis latipes (22. p. 208), 175 fms. 

 Heinsen, a,s Amphithopsis lati2)es (17. p. 135), Disko etc.; 100- 



160 fms., on Hydroids ; and on clay bottom ; largest, 16 mm. 

 Great Britain : Shetland Isles : Bate, as Calliope fingalli (adult) 



(35. p. 377) = Amphitkoe latipes, p. 380. 

 Normaii, as CalUopius ossiani and C. fingalli (21. pp. 280 



281); 40-90 fms. 

 East coast, Banff, Berwick, Yorkshire : — Bate, as Calliope 



ossiani (young form) (36. p, 262), 



