FROM THE GULF OF GUINEA. 129 



joint furnished with two long, slendei', terminal sette. The first joint of the anterior 

 foot-jaws is stout and without sjjiucs or settle ; the apical portion of the foot-jaw is long 

 and slender, the proximal half being about four times longer than broad and fijiely 

 ciliate on the inner aspect, while the distal half forms a strongly curved claw ; no 

 articulation was observed between the claw and tlie broadened basal part. Posterior 

 foot-jaw 4-jointed, second joint large, third and fourth much narrower and shorter; 

 the second, third, and fourth arc each provided with a small spine on the inner aspect; 

 terminal claw equal to fully twice the length of the last joint, stout and slightly curved. 

 Swimming-feet nearly as in Artotrogtis (PI. XIV. figs. 17, IS). No fifth pair were 

 observed. Siphon as in Artotrogns. 



RaUtat. Lat. 1° 55' 5" N., long. 5° 55' 5" E., in a tow-net gathering from 360 fathoms, 

 collected January 22nd. Station 23, in a tow-net gathering from 235 fathoms, collected 

 February 5th. 



Several sjiecimens of what may be the male (? immature) of this species occurred in 



the same gatherings ; they diff^ered in the following points : — Body elongate ovate ; 



abdomen long and very slender, and aj)parcntly 6-jointcd, the first segment lieing 



distinctly constricted in the middle (PI. XII. fig. 9). The anterior antenna? consist of 



four moderately stout, short joints, and an extremely long, slender, apical part without 



articulations (PI. XII. fig. 6). The approximate proportional lengths of the basal joints 



and long apical part are as follows : — 



25 ■ 8 ■ 8 . 4 . 270 . 

 12 3 4 5 



The posterior foot-jaws are more slender (PI. XII. fig. 8). All the other appendages 

 closely agree with the foregoing description. 



Caligus, Mliller. 

 Caligus (?) Thtmni, Dana. (PI. XIV. fig. 21.) 

 1853. Calii/us Tliijmni, Dana, Crust. U.S. Expl. Expecl. p. 1353, pi. xciv. fig. 3 ff. 



HaMtat. Station 9, in a tow-net gathering from 25 fathoms, collected about midday, 

 January 10th. One specimen only. 



This specimen, which is doubtfully referred to Caligus Thymni, Dana, differs from that 

 species chiefly in the form and comparative length of the posterior part of the abdomen. 

 In the ' Buccaneer ' specimen this part is somewhat narrower and longer proportionally 

 than Dana's figure represents Caligus Thymni to be. 



Caligus Murrayanus, n. sp. Provisional name. (PL XIV. fig. 19.) 



Length 3 mm. Prontal plate produced and much narrower anteriorly. Fourth pair 

 of feet elongate and rather slender. The first abdominal (genital) segment in the 

 female, Avhicli becomes wider posteriorly, is about ouc-and-a-half times longer than it is 

 broad at the middle, and equal to aloout half the length of the cephalothorax. The 



SECOND SERIES. — ZOOLOGY, VOL. VI. 17 



