528 DR THOMAS SCOTT ON THE 
Calanus acutus, Giesbrecht. 
1902, Calanus acutus, Giesb., Expéd. Antarct. Belge, ‘‘Copepoden,” p. 17, pl. i. 
This species occurred in two of the Scotia gatherings, in one from 200 fathoms 
collected in 69° 22’ S., 26° 36’ W., Station 273, and in another from 500 fathoms 
collected in lat. 68° 40’ 8., long. 30° 18 W., Station 280. 
Calanus propinquus, G. 8. Brady. 
1883, Calanus propinquus, Brady, Report Voy. “ Challenger,” vol. viii. p. 34, pl. ii. 
1892, 5 Geisb., F. Fl. Meapel, vol. xix. p. 91, pl. vii. figs. 31, 34 et seq. 
C. propinquus was met with very sparingly in a surface sample collected 28th 
November 1903 in 59° 43’ §., 48° 10’ W., Station 337b. The distribution of this 
species extends to the Atlantic, Pacific, and Indian Oceans, between lat. 55° N. and 
65° S. (GIESBRECHT). 
Genus Calanoides, G. 8. Brady, 1883. 
Calanoides brevicorms (Lubbock). 
1856, Calanus brevicornis, Lubb., Trans. Entom. Soc. Lond. (N.S.), vol. iv. p. 11, pl. 3. 
1892, 5 5 Giesb., F. Fl. Neapel, vol. xix. p. 90, pl. vi. figs 7, 9, 18 et seq. 
1894, »  frontalus, F. Dahl, Verh. d. zool. Gesellschaft, p. 76. 
1907, »,  brevicornis, G. O. Sars, Bull. de V Institut Océanographique, No. 101, p. 4. 
1909, Calanoides ,, A. Scott, “Siboga” Exped., Monogr. xxixa, ‘‘ Copepoda,” p. 10. 
1910, Calanus es Stebbing, Annals of the S. African Museum, vol. iv. pt. iv. p. 520. 
A few specimens were obtained in a surface tow-net gathering collected 5th May 
1904 off Cape Peninsula, 34° 21’ S., 18° 29’ H., Station 477. This species is easily 
recognised by the slightly crested forehead ; it appears to be widely distributed in the 
South Atlantic and Indian Oceans. The fifth pair of thoracic legs of the male of the 
species recorded here and of Calanoides patagoniensis, Brady, differ distinctly from 
those of the typical Calanus. 
Genus Megacalanus, Wolfenden, 1904.* 
Megacalanus gracilis (Dana). 
1849, Calanus gracilis, Dana, Proc. Amer. Acad., vol. ii. p. 18. 
This species occurred very sparingly at Stations 11, 15, 18, and 29, 23° 50’ N., 
21° 34’ W., to 12° 31’ N., 25° 09’ W., in the North Atlantic, and at Station 56 in the 
South Atlantic, 0° 42’ S., 31° 20’ W. 
Megacalanus robustior (Giesbrecht). 
1888, Calanus robustior, Giesb., Atti Acc. Lincet Rend., ser. iv., vol. iv., sem. 2, p. 332. 
1892, 99 3 idem, F. Fl. Neapel, vol. xix. p. 91, pl. vii. figs. 15, 19 et seq. 
Only a few specimens were obtained ; they occurred in a gathering from Station 11, 
23° 50’ N., 21°34’ W.,in the North Atlantic, and in two others, from Station 59, 2° 30’S8., 
32° 42’ W., and Station 62, 4° 15’ S., 33° 38’ W., in the South Atlantic. 
* See note on this genus in the Copepoda of the “ Siboga” Expedition, by ANDREW Scort (1909), p. 10 et seq. 
