62 ME, T. SCOTT ON ENTOMOSTEACA 



are dark-coloured ; the fiftli feet in the male are intermediate in form (fig. 35) between 

 Candace pectinata and Candace pachydactyla. The abdomen in the female has the first 

 segment stout and rounded — not "produced at each side into a triangular prominence," 

 as in Candace pectinafa. The first segment in the male, however, is produced on 

 the right side similar to that species. The posterior margin of all the abdominal 

 segments is finely and distinctly serrate. Between the second and third setse of the 

 caudal stylets (counting from the outside) there is a short stout spine, which was quite 

 conspicuous in some of the specimens. 



This species is intermediate between Candace pectinata and Candace pachydactyla, 

 but is readily distinguished from both by the characteristic dark-coloured dorsal hump 

 described above. 



Habitat. Station 2, 5 fathoms, January 1st (night collection). Station 9, 50 fathoms 

 (day collection). Lat. 1" 55' 5" N., long. 5° 55' 5" E., 36 fathoms, January 22nd (day 

 coUectionj. Station 23, surface and 10 fathoms, February 5th (day collection). Lat. 7° 

 5Ji' 6" S., long. 12° 14' 7" E., surface, February 9th (day collection). This species occurred 

 in 16 tow-nettings, 9 of which were surface and 7 under-surface gatherings ; the under- 

 surface tow-nettings were from 5 to 50 fathoms. The proportion of day to night 

 eatherings in which it was observed is shown in the annexed formula : — 



f 2 day collections. 

 17 



r 9 surface I 7 night ditto. 



Tow-nettmgs 16 <^ r a ^ ^•>.l. 



17 under-surfaceJ^' day ditto. 



I 3 night ditto. 



Candace intermedia, though restricted in its distribution, was nevertheless of frequent 

 occurrence in some of the gatherings in which it was observed. 



Candace varicans, Giesbrecht. (PL IV. figs. 38, 39 ; PI. VII. figs. 7-10.) 



1892. Candace varicans, Giesbrecht, Faima und Flora des Golfes von Neapel (Copepoden), p. 439, 



pi. 22. figs. 22, 23. 

 Candace tenuiremus, Scott (MS. name). 



Length, exclusive of tail-setce, 2"3 mm. Anterior antennse long and slender, reaching 

 to the extremity of the abdomen, 21-jointed in the female, the right antenna in the male 

 23-jointed ; the proportional lengths of the joints as in the annexed formula: — 



Male right antenna. 10 . 10 . 5 . 4 . . 7 . 3 . 4 . 3 . 3 . 4 . 4 . 8 . 7 ■ 8 . 8 . 6 . 13 . 11 . 13 . 7 ■ 6 . 8. 



1 2 3 4 5 7 8 9 10 11 12 13 14 1-5 16 17 18 19 20 21 22 23 24. 

 Female antenna . . . 12 . 10 . 4 . 4 . . 8 . 4 . 3 . 4 . 4 . 4 . 7 . 7 . 8 . 9 . 10 . 11 . 12 . 13 . 12 . 7 . 5 . 7 . 10. 



The 18th joint of the right male antenna (the joint on the proximal side of the hinge) 

 is distinctly pectinate ; the 17th joint, which is about half the length of the 18th, is finely 

 toothed, and the 19th has a fringe of small fine setse on the upper margin ; several of the 

 basal joints bear strong marginal spines, and the 20th joint is as long as the following 

 two joints together. The female antemiEe resemble those of Candace truncata. The 

 mouth-organs and first four pairs of swimming-feet resemble those of other species of 

 Candace. The 5th pair in the female 3-jointed, the last joint long, with three long, stout. 



