FKOM THE GULF OF GUINEA. 113 



Corycceus ohtusus Avas observecl in 39 tow-nettings, 23 of which were surface and IG 

 under-surfaee gatherings ; 7 of the surface and 10 of the undor-surface tow-nettings 

 were collected during the day, while 10 of the surface and 6 of the under-surface were 

 night collections, as shown in the annexed formula : — 



j 7 day collections. 



f 23 surface \ -,n „^„k+ a-*.*.^ 



m j-i- on ) 1 1" night ditto. 



Tow-nettings 39 < i. & 



(.10 under-surface { ^^^ '^^y '^it^^- 



1 night ditto. 



The under-surface tow-nettings ranged from 2i to 50 fathoms, and one at 185 fatlioms. 

 The hook-like process at the base and on the under surface of the first abdominal 

 segment seems to be peculiar to this species and forms one of its distinctive characters. 



Genus Copilia, Dana. -^ 



Copilia, Dana, Proc. Amer. Acad. Sci. 1849; Brady, Report on the Copepoda 

 of the ' Challenger' Expedition, 1883. 



Copilia mirabilis, Dana. 



1852. Copilia mirabilis, Dana, Crust. U.S. Expl. Exped. p. 1232, pi. Ixxx. figs. 14 a-g. 

 1856. Saphirina styUfera, Lubbock, Trans. Entom. Soc. vol. iv. p. 28, pi. iv. figs. 9, 10 ^ . 

 1863. ? Copilia denticulata, Claus, Die freilebcnden Copepoden, p. 161, pi. xxv. figs. 14-20. 

 1883. Copilia mirabilis, Brady, Report Chall. Copepoda, p. 117, pi. liii. figs. 1-11. 



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

 surface and 25 and 50 fathoms, January 10th (day collection). Lat. 1° 55' 5" N., lono'. 

 5° 55' 5" E., 10, 20, 30, 60, and 300 fathoms, January 22nd (day collection). Station 23, 

 surface, February 5th (day collection). 



Copilia mirabilis was observed in 70 tow-nettings, 21. of which were surface and 46 

 under-surface gatherings. The under-surface gatherings ranged in depth from 2 to 300 

 fathoms. 12 of the surface and 33 of the under-surface tow-nettings were day collections, 

 while 12 surface and 13 under-surface were night collections, as shown by the annexed 

 formula : — 



f 12 day collections. 

 ..• ,^(24 surface 1 12 night ditto. 



Tow-nettings 70 ^ r ^ -, T 



(.46 under-surface P3 '% ^^^^to. 

 1 13 night ditto. 



This species was of frequent occurrence in several of the tow-nettings. 

 Copilia qladeata, Dana. 



1849. Copilia quadrata, Dana, Proc. Amer. Acad. Boston, vol. ii. 



1866. Sapiiirinella pellucida, Claus, Die Copepoden-Fauna von Nizza. 



1892. Copilia quadrata, Giesbrecht, Fauna und Flora des Golfes von Neapel (Pelagische Copepoden), 



p. 658, pi. 2. fig. 3, pi. 50. figs. 1, 10, 13, 16, 22, 28, 33, 36, 41. 

 SECOND SERIES. — ZOOLOGY, VOL. VI. 15 



