282 DR THOMAS SCOTT ON THE 



Calanus acutus, Giesbrecht. 



1902, Calanus acutus, Giesb., Exped. Antarct. Beige, "Copepoden," p. 17, pi. 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' S., long. 30 18 W., Station 280. 



Calanus propinquus, G. S. Brady. 



1883, Calanus propinquus, Brady, Report Voy. " Challenger," vol. viii. p. 34, pi. ii. 



1892, Geisb., F. Fl. Neapel, vol. xix. p. 91, pi. vii. figs. 31, 34 et seq. 



C. propinquus was met with very sparingly in a surface sample collected 28th 

 November 1903 in 59 43' S., 48 10' W., Station 3376. The distribution of this 

 species extends to the Atlantic, Pacific, and Indian Oceans, between lat. 55 N. and 

 65 8. (GIESBRECHT). 



Genus Calanoides, G. S. Brady, 1883. 

 Calanoides brevicornis (Lubbock). 



1856, Calanus brevicornis, Lubb., Trans. Entom. Soc. Land. (N.S.), vol. iv. p. 11, pi. 3. 

 1892, ,, Giesb., F. Fl. Neapel, vol. xix. p. 90, pi. vi. figs 7, 9, 18 et seq. 



1894, frontalus, F. Dahl, Verh. d. zool. Gesellschaft, p. 76. 

 1907, ,, brevicornis, G. O. Sars, Bull, de I'Institut Oceanographique, No. 101, p. 4. 



1909, Calanoides A. Scott, "Siboga" Exped., Monogr. xxixA, " Copepoda," p. 10. 



1910, Calanus 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' E., 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., bo 12 31' N., 25 09' W., in the North Atlantic, and at Station 56 in the 

 South Atlantic, 42' S. ; 31 20' W. 



Megacalanus robustior (Giesbrecht). 



1888, Calanus robustior, Giesb., Atti Ace. Lincei Rend., ser. iv., vol. iv., sem. 2, p. 332. 

 1892, i. ,. idem, F. Fl. Neapel, vol. xix. p. 91, pi. vii. figs. 15, 19 et seq. 



Only a few specimens were obtained ; they occurred in a gathering from Station 1 1 , 

 23 50' N., 21 34' W., in the North Atlantic, and in two others, from Station 59, 2 30' S., 

 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 SCOTT (1909), p. 10 etseq. 



(ROY. 8OC. EDIN. TRANS., VOL. XLVI11., 528.) 



