50 MR. T. SCOTT ON ENTOMOSTEACA 



The imder-siirface tow-nettings ranged from 5 to 260 fathoms. This species was more 

 or less common in nearly all the tow-nettings in which it was observed. 



Scoj-ECiTHKix MINOR, Brady. 



1883. Scnlecithrix mirwr, Brady, op. cit. p. 58, pi. xvi. figs. 15-16; pi. xviii. figs. 1-5. 



Hahitat. Station 3, surface tow-netting, January 2nd (day collection). Lat. 3° 5.5' 3" N., 

 long. 4° 11' 8" E., 50 fathoms tow-netting, January 20th (day collectiou). Station 14, 

 10 fathoms, January 21st (night collection). Lat. 0° 21' 1" N., long. 7° 33' E., 20 fathoms, 

 January 29th (day collection). Station 23, 235 fathoms, Eebruary 5th (day tow-netting). 

 Station 24 (off the mouth of the Congo, colour of the water brownish-olive green to 

 amber-brown), surface, Eebruary 6th (day collectiou). 



This Scolecithrixv{di?>a. somewhat rare species in the 'Buccaneer' tow-nettings; males 

 especially were very scarce, and were observed only in a 30-fathoms tow-netting from 

 lat. 1° 55' 5" N., long. 5° 55' 5" E. The ultimate joint of the longer branch of the male 

 fifth foot and the appendage of the same branch were not so long as shown in the figure 

 in the ' Challenger ' Beport, but otiierwise the ' Buccaneer ' specimens agreed with the 

 description and drawings of Sooleciflirix minor (loc. cit.). I have examined many 

 specimens, mature and immature, of Scoleciihrix Dance, and have certainly not found the 

 fifth pair of feet in any of them to agree in structure with those of Scoleciihrix minor ; 

 hence I feel satisfied that the two are quite distinct from each other. 



SCOLECITHRIX LONGICORNIS, n. sp. (PI. V. figS. 20-28.) 



Female. Length, not including tail-sette, 1-54 mm. The first body-segment is more 

 than twice the entire length of the other three ; the forehead is rounded. Anterior 

 antenme slender, reaching to the extremity of the abdomen, 23-jointed, and furnished 

 with a number of very small setae (with the exception of the last joints, which 

 bear longer setas) (fig. 21) ; the proportional lengths of the joints nearly as in the 



formula : — 



G. 4. 3. 3. 3. 3.. 3. 7. 2. 3. 4. 4.. 5 .6.5. 6. 0.6. 6. 6. 6. 5. 4 



i 2 3 4 5 () 7 S U H) U ll' 13 14 15 IG 17 18 1!) 20 21 -I'l 23* 



The anterior foot-jaws terminate in four lobes with several plumose set?e at their 

 extremity, while one lobe forms the base of a fascicle of slender sensory filaments ; a 

 single filament also springs from the end of the lowest of the four setiferous lobes. 

 Posterior foot-jaws small, the first two joints long, the third very short, the fourth equal 

 to the entire length of the last three. Other mouth-organs similar to Scolecitlirix Dance. 

 The first four pairs of swimming-feet similar to those of Scoleciihrix securifrons. Eifth 

 pair small, 3-jointed, the middle joint rather longer than either of the other two, and 

 bearing several small spiniform setae at its exterior distal angle ; the extremity of the 

 last joint is produced forward into a triangular sharji-pointed process, wiiile an elongate 

 spine, serrate on the outer margin, springs from the inner distal angle (fig. 27). Abdomen 

 short, stout, composed of four segments, the first segment large, the other three very 



