142 MR. T. SCOTT ON ENTOMOSTEACA 



Haloctpeis torosa, n. sp. (PL XV. figs. 3, 4, 32, 35, 37.) 



Shell tumid ; surface of valves finely reticulated. Seen from the side the dorsal margin 

 is nearly straight, slightly sinuate ; a sulcus begins near the middle of the dorsal margin 

 and passes obliquely backward across each valve ; the tumidity extends downward, anterior 

 to the sulcus, and overhangs the nearly straight ventral margin. A second, though 

 very shallow, groove is observed in some of the more robust specimens, between the sub- 

 central sulcus and the posterior extremity. Posterior margin truncate, dorsal angle 

 slightly produced; at the anterior end the ventral margin rises obliquely in a nearly 

 straight line and merges in the small rounded angle below the notch. The beak is a 

 hood-like process with broad overhanging sides. Shell highest at the posterior end ; 

 height equal to nearly half the length ; length 3"75 mm. Seen from above oblong- 

 ovate, widest behind the middle ; greatest width equal to two fifths the length. 

 Sides sinuous, posterior extremity rounded, anterior end bluntly angular. Anterior 

 antennae with four apical setai and a curved hair- like filament; one of tlie ajiical 

 setce is very long and is provided with a fringe of small teeth on a portion of the 

 proximal half, similar to Ilalocypris imhricuta ; a small plumose seta springs from near 

 the middle of the penultimate joint. The blunt-pointed arrow-like head of the tentacle 

 reaches slightly beyond the extremity of the antennae. Secondary branch of the posterior 

 antennae furnished with a stout plumose seta on the enlarged basal joint ; the small 

 terminal joint benrs an extremely long ringed seta, another about one third as long, and 

 five very small setae, as well as a strongly-hooked claw. The first foot consists of four 

 moderately long subequal joints, wiiich are sparingly setiferous, and a very small terminal 

 joint furnished with three long plumose setae. 



Habitat. The following are some localities where this species was obtained : — 



January 5th, lat. 5° 58' 0" N., long. If 20' 0" W., collected near surface. 



4^ 7' 3" E., 20 and 30 fathoms. 

 5° 7' 8" E., 20 fathoms (Station 14). 

 5° 55' 5" E., 35 and 460 fathoms. 

 6° 36' 6" E., 10 fathoms. 



This species appears to be intermediate between II. atlantka, Lubbock, and H. imbri- 

 cata, Brady. 



Halocypris aculeata, n. sp. (PI. XV. figs. 5, 6, 33, 34, 38.) 



Shell seen from the side highest at the middle, height nearly equal to half the length ; 

 dorsal margin straight, right valve terminating posteriorly in a short backward- directed 

 spine-like process, similar to that at the anterior extremity of the left valve ; ventral 

 margin convex, evenly rounded, and forming a continuous curve from the postei'O-dorsal 

 spine round to the shallow notch under the beak in front. Seen from above elongate- 

 ovate, widest at the middle, evenly rounded, and tapering to the posterior extremity; 

 tapering and somewhat sinuate anteriorly. Valves smooth. Length 1 mm. 



