FEOM THE GULF OF GUINEA. 51 



short. Caudal stylets short, the length and hreadth equal ; each stylet bears four long 

 plamose terminal seta;, and one small seta on. the inner distal angle. 



Habitat. Lat. 1° 55' 5" N., long. 5° 55' 5" E., 3G0 fathoms (day collection). Station 23, 

 135 fathoms, February 5th (day collection). 



This Scolecithrix was obtained in only two tow-nettiags from comparatively deep -water. 



ScoLECiTHRix Bradyi, Gicsbreclit. (PL V. figs. 29-39.) 

 1892. Scolecithrix Bradyi, Giesbreclit, op. cit. p. 283, pis. 4, 13, 37. 



Length about 1-8 mm. In form like that of Scolecithrix Dance. Anterior antennis in 

 the male as long as the cephalothorax, 19-jointed; in the female 23-jointcd and about 

 one-fourth longer than those of the male. The proportional lengths of the joints are 

 nearly as in the annexed formula : — 



Male. 4. 4. 2. 2. 2. 2. 2. 12. 3. 4. 5. 5. 5. 5. 4. 4. 5. 6. 7. 



12345 B 78 ^DIO 11 12 13 14 15 16 17 18 19 20 21 22 23. 

 Female. 5. 5. 3. 3. 3. 3. 3. 7^. 3. 4. 5. 5.5.6.6.6.6.5.5.5.6.5.3." 



The basal joints bear a number of setse, but the others are very spai-ingly setiferous ; 

 posterior antenme and mouth-organs as in Scolecithrix Bance, but the larger branch of 

 the mandible-palp bears a number of very long slender setie. The first four pairs of 

 swimming-feet are similar to those of Scolecithrix securifrons ; the terminal spines of 

 the outer branches are finely but somewhat ixnequally serrate on the outer margin and 

 ciliated on the inner. Eifth pair wanting in the female, 1-branched in the male ; basal 

 joints dilated ; the third joint of the (?) right foot elongate, with a short digit-like process 

 on the inner margin near the distal end, the last joint divided to near the base into two 

 subequal segments, the inner of which is curved upward so as to form a hook-like 

 appendage. The (?) left foot 5-jointed and longer than the other; the second joint is 

 the longest, being nearly as long as all the following three together, and bearing at its 

 inner distal angle an appendage which is fully as long as the third joint. Abdomen and 

 caudal stylets in both sexes as in Scolecithrix Dance. 



Scolecithrix Bradyi resembles Scolecithrix Dance very nearly in its general form, but is 

 much smaller ; it differs in possessing extremely long hairs on the larger branch of the 

 mandible-palp, and especially in the form of the fifth pair of feet. 



Suhitat. Station 2, 25 fathoms tow^-netting, January 1st (night collection). Station 9, 

 50 fathoms tow-netting, January 10th (day collection). Olf Sao Thome Island (lat. 0° 

 34' N., long. G° 30' 4" E.), 20 fathoms tow-netting, January 23rd (day collection). Station 

 23, 135 fathoms tow-netting, Eebruary 5th (day collection). 



Scolecithrix affiuis was obtained in thirteen of the tow-nettings, one only of which was 

 a surface (night) gathering, the other twelve being under-surface, the depth of which 

 ranged from 5 to 360 fathoms, and of which three were collected during the day and nine 

 during the night, as in the formula : — 



f day collection. 



r 1 surface { -. • i . tv-v- 



m i.^- TO (_ 1 night ditto. 



Tow-nettmgs 13< ^ ° 



\\-2 under-surface/ 3 day collections. 



1 9 night ditto. 



7* 



