74 ME. T. SCOTT ON ENTOMOSTEACA 



the first nearly tAvice t)ie entire length of the other four. Porehead rovinded, produced 

 into a sniall, sharp-pointed rostrum. Anterior antennre slender, as long as the cephalo- 

 thorax, 20-jointed, and sparingly setiferous, the proportional lengths of the joints as in 

 the formula : — 



34 . 4. 4. 4. 4. 3.3. 4.4.4. 4. 1 . 16 . 10 . 12 . 12 . 18 . 15 . 18 . 22 



"T 2 3 4 5 7 « 10 11 12 13 14 1-5 16 17 18 19 20' 



The first joint is stout and long, and the second considerahly broader than those 

 immediately following. The primary branch of the posterior anteunfe is short and 

 2-jointed ; the secondary branch is fully twice the length of the other, and composed of 

 six joints ; the second joint is long and about equal to the entire length of the next four ; 

 the third, fourth, and fifth joints are very small (fig. 39). Mandible-palp small, one 

 branch is 4-, the other 2-jointcd (fig. 40). Maxillte nearly as in Brepanoiyus j^ectiiuctiis. 

 Anterior foot-jaw very small, with four (or five) marginal setiferous lobes. Posterior 

 foot-jaw small, 7-jointed, and bearing a few spinous setoe ; the first and second joints are 

 elongate, the third short, the fourth about twice the length of the third, the fifth about 

 equal to the third and as long as the next two together (fig. 44). The first four pairs of 

 swimming-feet resemble those of Drepanopus pectinatns, except that the first two joints 

 of the outer branch of the first pair have no spines on the exterior distal angles. The 

 fifth pair are simple and consist of one very short 2-jointed In'anch, and one which is long 

 and 4-jointed ; the last joint of the short branch is very small and terminates in three 

 small spines ; the extremity of the long branch terminates on one side in a digitiform 

 lobe, which is opposed by a finger-like process, articulated to the l)asal part of the lobe ; 

 both are fringed wdth fine cilia (fig. 45). Abdomen 5-jointed, the last segment very 

 small. Caudal stylets short, length about equal to the breadth, each furnished with 

 four plumose terminal seta?. 



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

 January 10th (day collection). Lat. 3^ 58' N., long. 3° 42' W., 25 and 50 fathoms, 

 January 13th (day collection). Off Accra, 3 fathoms, January 16th (night collection). 

 Lat. 1° 55' 5" N., long. 5° 55' 5" E., 3C0 fathoms, January 22nd (day collection). Off 

 Sao Thome Island, 20 fathoms, January 23rd (day collection). 



Males only of this species were obtained. 



Genus Phylloptjs, Brady. 

 Phyllopus, Bi-ady, Report on the Copep. of tlie Chall. Exp. 1883. 



Phylloptjs bidentatus, Brady. (PL \1. figs. 26-28.) 



1883. P/tyllopus bkkntatus, Brady, Report Cluill. Copep. p. 78, pi. v. figs. 7-14. 



Habitat. Station 2, 5 fathoms, January 1st (night collection). Lat. 1° 55' 5" N., 

 long. 6° 55' 5" E., 360 fathoms, January 22ud (day collection). Temperature of water 

 at 360 fathoms about 43' E. 



Three specimens only of this curious form were obtained, and they were all more or 



