52 MR. T. SCOTT ON ENTOMOSTEACA 



ScoLECiTHRix LATIPES, n. sp. (PI. III. figs. 21-23 ; PI. V. figs. 40-43.) 



Temale. Length 8'2 mm. (l-8th of an inch). Body stout. Abdomen short, 4-jointed 



Porehead with a median keel extending round the front to the bifid rostrum. Anterior 



antennte rather longer than the thorax, 23jointed, sparingly setiferous (fig. 58). The 



proportional lengths of the joints are as shown in the formula : — 



35 . 5 . 5 . 5 . 5 . 5 ■ 11 ■ 5 . 5 . (i . 8 . 8 ■ 8 . 8 ■ 9 ■ 9 ■ 6 . 8 . 8 ■ (j . 9 . 10 . 7 

 T 2~irT~5^6 7 8 9 10 11 12 13 14 15 10 17 18 19 20 21 22 23' 



The posterior antennae, mouth-organs, and swimming-feet are somewhat as in Scole- 

 cithrix I)ancp, but the anterior foot-jaws are strongly gibbous on the underside (PL V. 

 fig. 42). The fifth pair of feet are simple, considerably dilated, especially towards the end, 

 and are each furnished with three spines on the broadly-rounded apes ; the inner ^^voq, 

 which is longer than the others, is finely serrate on the outer margin, the others are plain 

 (PL III. fig. 22). Caudal stylets short, shghtly divergent, and furnished with four long, 

 plumose, terminal setse. 



This form, of which only one or two specimens (females) were obtained, occurred in a 

 gathering from 85 fathoms, collected February 5th at Station 23 (lat. 4° 26' T S., 

 long. 10° V 8" E.). 



Scolecithrix latipes was readily distinguished from the other species of Scolecithrix by 

 the pecuHar form of the fifth pair of feet, which are broad and leaf-like. 



Scolecithrix major, n. sp. (PL III. figs. 24-26 ; PL V. figs. 44, 45.) 



Female. Length 3 mm. (l-8th of an inch). Body elongate. The anterior foot-jaws 

 are stout and the marginal lobes are furnished with long, spiniform, plumose, terminal 

 setae ; all the sensory filaments are large with the exception of two, which are smaller and 

 provided witli elongate acutely -pointed heads. The terminal spines of the swimming-feet, 

 especially those of the third and fourth pairs, are coarsely toothed on the outer margin ; 

 there are sixteen or seventeen large teeth along the margin. Fifth pair small, simple, 

 2-jointed ; the last joint is about three times the length of the other, and armed with 

 one moderately long terminal and one small subtermiual spine, while a long spiniform 

 seta springs from near the middle of the inner margin. Abdomen long, composed of four 

 segments, the first three nearly equal, the last much shorter. Caudal stylets short, about 

 as long as the last abdominal segment ; apical sette four, plumose. 



Habitat. Lat. 1° 55' 5" N., long. 5° 55' 5" E., 460 fathoms (day collection, January 22nd). 



The form of the animal, the armature of the anterior foot-jaws, and the coarsely-toothed 

 terminal spines of the swimming-feet are characters which distinguish this from other 

 species of Scolecithrix. A considerable portion of the anterior antennte was wanting in 

 the only specimen obtained. 



Scolecithrix tumida, n. sp.* (PL III. figs. 33-38.) 



? Scolecithrix ubyssalis, Giesbreclit, op. cit. p. 284, pL 13. figs. 15, 40, pi. 37. fig. 7. 



Female. Length 2-4 mm. Body somewhat robust ; forehead obtuse, with a small 



* This is probably the Scola-ithi-iv abi/ssalis of Giesbrechfc ; but, as there appear to be some difi'erences between his 



