530 DR THOMAS SCOTT ON THE 
Eucalanus subtenuis, Giesbrecht. 
1888, Hucalanus subtenuis, Giesb., op. cit., p. 33. 
1892, - 53 idem, F. Fl. Neapel, vol. xix. p. 132, pls. xi. and xxxv. 
A few specimens were obtained in samples from Stations 26, 27, and 59, 14° 33’ N., 
25° 09’ W., to 2° 30’ S., 32° 42’ W. 
Genus Rhincalanus, Dana, 1852. 
Rhincalanus gigas, G. 8. Brady. 
1883, Rhincalanus gigas, Brady, Report Voy. “‘ Challenger,” vol. vill. p. 42, pl. vin. figs. 1-11. 
1888, " nasutus, Giesb., op. cit., p. 334. 
1902, fy grandis, Giesb., Hupéd. Antarct. Belge, ‘‘Copepoden,” p. 18, pl. 1. 
1909, ¥5 gigas, A. Scott, “ Siboga” Kxpeditie, Monogr. xxixa, ‘ Copepoda,” p. 24, 
This species was obtained in two gatherings—one from 200 fathoms, collected 
28th February 1903 in 69° 22’ 8, 26° 36’ W., Station 273; the other from 500 
fathoms, collected 2nd March, also 1908, in 68° 40’ S, 30° 18’ W., Station 280. 
Several specimens were obtained, large and small; the larger measured fully 8 mm. in 
length, while the smaller were similar to . nasutus. 
A careful examination of these Scotia specimens leaves scarcely any doubt in my 
mind that they all belong to the one species—Rhincalanus gigas of Brapy, the only 
apparent difference between the largest and the smallest specimens being the difference 
in their size. Brapy’'s specimens ranged from 8°5 to 10 mm., while the largest of the 
Scotia specimens measured fully 8 mm., and ranged from that to specimens no bigger 
than those found in the North Sea. J am therefore unable to regard Rhincalanus 
nasutus as anything more than a small variety of R. gigas, while R. grandis is a finer 
and somewhat larger form of the same species. 
Rhincalanus cornutus, Dana. 
1849, Calanus cornutus, Dana, Proc. Amer. Aca:., vol. ii. p. 19. 
1852, Rhincalanus cornutus, Dana, U.S. Explor. Exped., vol. xiii., I1., p. 1083, pl. Ixxvi. 
Tolerably frequent in two surface gatherings collected 5th May 1904, Station 477, 
off Cape Peninsula (34° 21’ 8., 18° 29’ E.), South Africa. 
Genus Mecynocera, I. C. Thompson, 1888. 
| Mecynocera clausi, I. C. Thompson. 
1888, Mecynocera clausi, I. C. Thompson, Journ. Linn. Soc., “ Zool.,” vol. xx. p. 150, pl. xi. 
Mecynocera was observed in gatherings from Stations 7, 10, 12, 18, 15, and 28, 
all in the North Atlantic, between 26° 23’ N., 20° 20’ W., and 18° 7’ N., 25° 9’ W. 
I. C. Tompson collected his specimens at the Canary Islands, nearly in the same 
latitude as Station 7, 26° 23’ N., 20° 20’ W. 
