COPEPODA. 



typically Antarctic species ever find tlieir way northwards l)y way of the deep Atlantic 

 trough, hut there is little evidence of it in the many collections made by the ' Gauss ' 

 throughout its Atlantic traverse. A certain numl^er of species which are ubiquitous, 

 such as Oithona simili-<, some species of Oncen, Haloptilus loiigiconm, Gaidius 

 tenuispinus and major, and Gaetanus {(irmiger, and possibly cmidani), extend from the 

 Faroe Channel to the southern ocean ; but so far as the evidence at present goes, 

 the Antarctic Copepod fauna is distinct from that of the Arctic seas, and the species 

 which are typical of this region, and most numerous, do not extend far into the 

 Southern Atlantic. As no observations have been made of the Copepod fauna of the 

 deep water of the Indian Ocean, it is quite possible that Antarctic species may l»ear a 

 considerable extension northwards in this direction. 



It is curious that no great number of Ilaipacticidse appear in the collections of the 

 'Discovery,' only three examples all told oi liarpacticus furcifer, \vhk-h is iiornewha,t 

 difi"erent from any Harpacticus of the northern hemisphere ; and only five are described 

 from the 'Belgica' collection by Dr. Giesbrecht, two of which {-H. brevicornis, H. chelifer), 

 are identical with northern species. A fair number of species occur in the ' Gauss ' 

 collection, but these have not yet been examined. 



The paucity in numbers of the Harpacticidse in the ' Discovery ' captures is no 

 doubt due to the mode of collection. 



II. 



List of Copepods in the ' Discovery ' Collection. 



Euchccta antarctka. 



Metridia gerlachei. 



„ princeps. 

 Calanus acutus. 



„ jjropiii quits. 



„ tonsus. 



„ similUmus. 

 Cteiiocalanus vanus. 

 Oithona similis. 



„ friffida. 

 Oncea ciirvata. 



Harpacticvs furnfer. 



Microcalanus piisillus. 

 Stephus longipes. 



„ aiitarcticvm. 

 Xanfhocidanus antarctkus. 



„ magnus. 



ParalaUdocera hodgson /. 

 Rhincalanus grandls 

 Clausocalanus arcukornis. 

 Haloptilus occllatus. 

 Faroella antarctka. 

 Gaetanus antarctkus. 

 Heterorrhahdus longkornis. 



CALANUS (Leach). 



The species first described by Brady as Calanus propinquus has been subsequently 

 described by Giesbrecht, who now concludes ('Belgica' report, p. 16) that the copepod 

 described by himself in 1892 as C. propinquus from the S.W. Atlantic, between 37° and 

 52° S., is not this species, liut one closely resembling it, to which he gives the name 



