COPEPODA. 43 



more tlian one quarter as long as Fi 1. Ee I elongated and seven or eight times as 

 long as broad. , 



Anterior foot jaws with a rather stout, but unarmed hook on the fifth lobe, not 

 longer, however, than the other bristles. 



Posterior foot jaws thick, with Hi of similar thickness to B 2, and of five 

 segments ; the five stout curved hook bristles of nearly equal length, the two terminal 

 only a little the longest and thickest. 



]\Iandibles with jRi very long and He only as long as Hi 1 ; masticatory plate with 

 outer stout, Ijroad-basecl. conical and curved tooth ; three pointed short teeth internal 

 to it, ratlier like //. mucronatuf<. 



Maxillae. — First inner lobe with six l)ristles, of which only two of the distal ones 

 are stout hooks ; second inner lobe with one stout long bristle ; third inner lobe with 

 one stout elongated and two short thin bristles ; B 2 about as In-oad as long, with four 

 elongated and thick bristles and one thin, short proximal bristle, Ri longer than broad, 

 and about three-quarters as long as B 2 and only half its width, and with five bristles ; 

 Ee very long, twice as long as Ei + B2, and nearly twice as long as broad, with eleven 

 bristles, of which the three innermost are short and thin. 



All feet with three jointed rami, Ee of fifth pair only five-sevenths as long as Ee 

 of fourth pair; El of fifth pair only as long as Ee 1 + 2 ; Ee S longer than i?e 1 + 2, 

 twice as long as broad, with three inner l.)ristles, two outer spines, and end spine nearly 

 as long as the last segment. I have not yet seen the 6 of this species. 



OITHONA (Baird). 



Two species of this genus occur in these collections, one of which, vie, OltJiona 

 similis, is of world-wide distribution, and occurs with great frequency in Antarctic 

 collectidiis ; the other, to which the name Oithona frigida has been given by 

 Giesbrccht (and which has been fully described by him in the ' Belgica ' report, vide 

 ante), occurs very sparingly in the ' Discovery ' collection. 



HARPAOTICUS (Dana). 

 Harpacticus furcifer. 

 Harpacticus furcifer, Giesbrecht,, ' Belgica ' Eeport, p. 37. 



The 9 of this species was first described by Giesbrccht in the ' Belgica ' report ; 

 and in the 'Discovery' collection, marked 4. i. 02. W.Q., occurred three specimens of 

 the male, though female examples were conspicuously absent. 



The ?, according to Giesbrccht, is r55 mm. long; the rostrum small, the 

 series of points on the abdominal segments not numerous, the furca as long as both last 

 abdominal segments, narrowing distally and about three times as long as broad ; the 



VOL. IV. P 



