28 ME. T. SCOTT ON ENTOMOSTEACA 



of the fourth pair being more slender. The fifth pair resemble those of Faracalanus 

 parvus, but are proportionally stouter and have much shorter terminal spines. Abdomen 

 small, composed of four segments, the second and third segments very short. Caudal 

 stylets nearly as long as the last abdominal segment, breadth about half the length ; 

 apical setse four. No males were observed. 



Rahitat. Lat. 3° 57' 2" N., long. 7° 42' 8" W., 2 fathoms, January 9th (night collection). 

 Libreville, Gaboon River, surface, January 28th (day collection). Bananah Creek, 

 Congo River, surface, February 7th (day collection). 



Comparatively few specimens of Faracalanus pygmceus were obtained. 



Genus Eucalantjs, Dana. 



Eucalanus and Calarms (iu part), Dana, Crust. U.S. Expl. Exped. (1852). 



ElJCALANUS ATTENUATUS, Dana. 



1852. Calanus attenuatus, Dana, loc. cit. p. 1080, pi. Ixxv. fig. 2. 



1856. Calanus mirabilis, Lubbock, Trans. Entom. Soc. vol. iv. pi. v. figs. 1-6. 



1883. Eucalanus attenuatus, Brady, op. cit. p. 38, pi. ii. figs. 8-10, pi. vi. figs. 1-8. 



Habitat. Station 2, 5, 25, and 50 fathoms tow-nettings, January 1st (night collections). 

 Station 9, 25 and 50 fathoms tow-nettings, January 10th (day collections). Station 14, 

 10 fathoms tow-netting, January 21st (night collection). Lagoon Island, Sao Thome, 

 surface tow-netting, January 28th (night collection). Station 23, surface, 10, 20, 85, 135, 

 185, and 235 fathoms tow-nettings, February 5th (day collections). Bananah Creek, 

 Congo River, surface tow-netting, February 7th (day collection). Loanda Ilarbour 

 (seaward), surface, February 15th (day collection). 



This was one of the more common and generally distributed sj)ecies in the ' Buccaneer ' 

 collections. It occurred in 89 tow-nettings, 41 of these being surface and 48 under- 

 surface gatherings. The under-surface tow-nettings ranged in depth from 2 to 460 

 fathoms. 18 of the surface and 35 of the under-surface gatherings were collected 

 during the day, while 23 of the surface and 13 of the under-surface were collected during 

 the night, as in the formula: — 



18 day collections. 



r 18 day collectic 

 -41 surface \ 23 night ditto. 



Tow-nettings 89- 



Us under-surface J 3-^ "^"^^ ^^^^^'O- 

 1 13 night ditto. 



Eucalanus attenuatus was taken at the surface in the open sea, the specific gravity of 

 the water being 1-02543 and temperature 85°-5 F., and at 360 fathoms with the tem- 

 perature of the water at about 43° F. It was taken off the mouth of the Congo River, 

 where the specific gravity of the water was 1-01984 and the temperature 82° F. (the 

 colour of the water here, — lat. 6° 54' 3" S., long. 11° 33' E., — was "brownish olive-green to 

 amber-brown "), and at Bananah Creek, where the specific gravity was only 1'00870. It 

 will be observed from these records that this Eucalanus is able to live in water of very 

 varied character, as regards density and temperature. A species capable of existing 



