TEOM THE GULF OF GUITs'EA. 59 



in the other swimming-feet. The fiftli pair (fig. 25) closely resemble those of Euchceta 

 Sessei as figured in the ' Challenger ' Copepocla. Abdomen composed of four nearly 

 equal segments. Caudal stylets very short, furnished with four long plumose hairs. 



Hahitcd. Lat. 1° 55' 5" N., long. 5° 55' 5" E., 460 fathoms (day collection, January 22nd). 



This comes very near Euchceta Sessei* and is possibly a form of that species. It 

 differs in the following points : — It wants the prominent rostrum of Euchceta Hessei ; the 

 posterior margin of the last thoracic segment bears on each side a small but distinct 

 aculeate spine; it possesses small but stout anterior foot-jaws; the inner edge of the terminal 

 spines of the swimming-feet is densely cilia te. The right foot of the fifth pair has no 

 secondary appendage and terminates in a spiniform process ; the left foot has a very short 

 inner appendage, and the last joint, which is elongate, is geniculate near the middle. 



No females were observed. 



Etjch.^ta hebes, Giesbrecht. (PI. VI. figs. 18 & 19.) 

 1892. Euchceta hebes, Giesbrecht, op. cit. p. .263, pis. 15, 16, 37. 



Male. Length 2"7 mm. (l-9th of an inch). Body elongate, rostrum small. Anterior 

 antennae not longer than the thorax, 22-jointed ; the second joint bears a number of small 

 club-shaped appendages ; the upper margin of the eighth joint is produced near the 

 distal end into a small digitiforni setiferous lobe ; the proportional lengths of the joints is 

 shown in the annexed formula : — 



G. 5. 3. 3. 3. 4. 4. 9. 4. 4. 6. 6. 6. 7. 7. 8. 9. 8. 8. 9. 8. 11 



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 IS 19 20 21 22 



Posterior antennjB robust, the primary branch considerably shorter than the secondary. 

 Mouth-organs as in Euchceta marina, except that the posterior foot-jaws are com- 

 paratively short and stout. Swimming-feet nearly as in Euchceta marina ; the 

 fifth pair are unequal in length ; the left is 2-branched, the outer branch 3-jointed, 

 the last joint being long and slender, with a bluntly rounded extremity, the inner branch 

 is 1-joiuted and as long as the first two joints of the outer branch ; the right foot, 

 which has a small rudimentary inner branch, is shorter than the other and terminates in 

 three processes ; one of these processes is stout, curved, and spiniform ; the second is 

 oblong-ovate, somewhat truncate at the apex, and bears a dense fringe of cilia on the 

 distal end of the inner margin ; tlie third is a strong, somewhat hook-like appendage, 

 serrate on the inner edge. The whole forms a complicate apparatus with which the left 

 foot probably interlocks. Abdomen elongate, of four nearly equal segments, the posterior 

 margins of which are serrate. Caudal stylets very short, nearly obsolete, and furnished 

 with four plumose setae — the third from the outside being considerably longer than the 

 others. 



Mahitat. Station 2, 50 fathoms (night collection, January 1st). Station 9, 50 fathoms 

 (day collection, January 10th). 



* This reference is to the description aud drawings of Eachnia J/csscl in the 'Challenger" Copepoda, as no Eucha;ta 

 agreeing -with these was obtained in the ' Buccaneer ' collections, 



8* 



