ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 283 



Genus Undinula, A. Scott, 1909. 



Syn. Undina Dana (name preoccuiiied). 



Undinula vulgaris (Dana). 



1849, Undina vulgaris, Dana, op. cit., vol. ii. p. 18. 



1892, Calmius „ Giesb., F. Fi. Neapel, vol. xix. p. 92, pi. vi. fig. 11 ; pi. vii. fig. 2 et seq. 



This species was observed in surface tow-net gatherings from a considerable number 

 of stations, extending from Station 8, in 26° 12' N., 20° 25' W., to Station 82, in 

 20° 40' S., 38° 20' W. Both males and females were obtained. The structure 

 of the fifth pair of thoracic legs in the male of this and the following species is so 

 remarkable and so entirely different from those of the typical Calanus, that, as indicated 

 by G. 0. Sars, the position of these two species in the genus Calanus can scarcely be 

 maintained. Dana ascribed the species named above to the genus Undina, but 

 unfortunately that name was already occupied by Gould and also by Munster, and a 

 modified form of the name was therefore adopted for the genus by my son in his Keport 

 on the Copepoda of the Sihoga Expedition. 



Undinula darivinii (Lubbock). 



I860, Undina darwinii, Lwbbock, Trans. Linn. Soc. Loud., vol. xxiii. p. 7, pi. xxix. 

 1892, Cala7ius „ Giesb., F. Fl. Neapel, vol. xix. p. 91, pi. vi. fig. 5 et seq. 

 1909, Undinula „ A. Scott, " Siboija" Expeditie, "Copepoda," p. 17. 



Several specimens, chiefly females, were obtained in a surftice tow-net gathering 

 collected 4th May 1904 in 34° 43' S., 17° 15' E., Station 476. This species is a true 

 Undinula. 



Fam. EUCALANID.E. 



Genus Eucalanus, Dana, 1852. 



Eucalanus attenuatus, Dana. 



1849, Calamis attenuatns, Dana, op. cit., vol. ii. p. 18. 



This species occurred in samples from only five stations, all in the North Atlantic, 

 viz.. Stations 11, 12, 14, 20 and 26, 23° 50' N., 21° 34' W., to 14° 33' N., 25° 9' W. 



Eucalanus crassus, Giesbrecht. 



1888, Eucalamts crassus, Giesb., Atti Ace. TAncei Rend., ser. 4, vol. iv. p. 333. 

 1892, „ ,, idem, F. Fl. NeapH, vol. xix. p. 132, pi. iv. fig. 9 et seq. 



This Eucalanus was obtained sparingly in two surface gatheiing.s — one collected at 

 Station 19, in the North Atlantic, 19° 12' N., 24° 08' W., the other at Station 68, in the 

 South Atlantic — Pernambuco Lighthouse, bearing 7° 42' S., 34° 32' W, 



^Rin. Soc. EDIN. TKA.NS., VOL. XLVUl., bi^.) 



