COPEPODA. 7 



typically Antarctic species ever find their way northwards by way of the deep Atlantic 

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

 throughout its Atlantic traverse. A certain number of species which are ubiquitous, 

 such as Oithona similis, some species of Oncea, Haloptilus longicornis, Gaidius 

 tenuispinus and major, and Gaetanus (armiger, and possibly caudani), 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 bear a 

 considerable extension northwards in this direction. 



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

 ' Discovery,' only three examples all told of Harpacticus furcifer, which is somewhat 

 different 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 Harpaeticidse in the ' Discovery ' captures is no 

 doubt due to the mode of collection. 



II. 



List of Copbpods in the 'Discovery' Collection. 



Euchceta antardica. 



Metrldia gerlachei. 



„ princeps. 

 Calanus aeutus. 



„ propinquus. 



„ tonsus. 



„ simillimus. 

 Ctenocalanus vanus. 

 Oithona similis. 



„ frigida. 

 Oncea curvata. 



Microcalanus pusillus. 

 Stephus longipes. 



„ antarcticum. 

 Xanthocalanus antarcticus. 



„ magnus. 



Paralalidocera hodgsoni. 

 Rhincalanus grandis. 

 Clausocalanus arcuicornis. 

 Haloptilus oeellatus. 

 Faroella antardica. 

 Gaetanus antarcticus. 

 EeterorrhaMus longicornis. 



Harpacticus furcifer. 



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, but one closely resembling it, to which he gives the name 



