FEOM THE GrLF OP GUINEA. 81 



January lltli. Oflf Sfio Thome Island (lat. 0° 34' N., long. & 30' i" E.), 20 fathoms, 

 collected January 23rd. Lat. 4 26' 7" S., long. 10 1' 8" E., 235 fathoms, coUcctcd 

 February 5th, etc. 



Meci/nocera Clausii Avas observed in 16 of the tow-net collections, 1 only being 

 a surface gathering; the deepest under-surface gathering in which it was observed 

 was 235 fathoms. 



1 day collection. 



r 1 ciay coueciic 

 1 surface | night ditto. 



Tow-nettings 16s. ^ -, ^ . ,, ,. 



1 15 under-surface/ ^^ '% collections. 

 I 3 night ditto. 

 The ' Buccaneer ' specimens of this species differed from Ilecynocera Clausii, I. C. 

 Thompson, as described and figured in the ' Transactions ' of the Linneau Society, 

 vol. xs. p. 150, pi. xi. tigs. 1-1. Ilecynocera Clavs'd is there described as wanting a fifth 

 pair of feet, whereas the ' Buccaneer ' specimens possess a fifth pair large enough to be 

 easily observed without requiring to dissect the animal to see them. 



Genus Phaenna, Glaus. 



Phaenna, Claus, Die freilebenden CopejDodeu, 18(53. 



Phaenna spinifeea, Glaus. (PL VI. fig. 35 ; PI. VII. figs. 1, 2.) 



1863. Phaenna spinifera, Clans, Die freilebenden Copepodeu, p. 189, pi. xxxi. tigs. 1-7. 



Length 2'25 mm. Body globose (breadth about 1"1 mm.), composed of five segments, 



the first rather longer than the next two together. Anterior antennae as long as the 



cephalothorax, 2i-jointed. The proportional lengths of the joints are very nearly as 



shown in the formula : — 



10 .4. 3. 4. 4.4. 4. ■> .4.4. 4. 6.7.9. 9. 9. 10. 10 .8.9.7.8.9.4 

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24' 



Sparingly setiferous ; the basal joint in the female bears on its upper margin a single 

 plumose seta*. The ends of the third, last, and of the basal joints bear each a plumose 

 hair on the underside. In the male the basal joint wants the plumose seta. The 

 posterior antennae have the primary branch much shorter than the secondary ; the 

 secondary branch 5-jointed ; the first and last joints are large, the three intermediate 

 ones very small, both branches furnished with long plumose hairs. Mandibles elongate, 

 bearing numerous small teeth at the distal ends ; mandible-palp stout, 2-branched, both 

 branches furnished with plumose hairs, the basal part with three short hairs on its 

 inner aspect. Maxillre large, foliaceous. Anterior foot-jaw.s short, truncate; joints 

 crowded, not clearly defined, setiferous, the apical part bearing one long, faintly serrate, 

 spinif orm, curved appendage ; and a number of peculiar, cylindrical processes (sense- 



* " Das basale Glied triigt im weiblicheu Gescliiecbte eine befiederte Borste," Claus, loc. cil. p. 189. 

 SECOND SERIES. — ZOOLOGY, VOL. VI. 11 



