COPEPODA. 



grandis (49), Oit/wmt similut (52), Paracalanus parvw (52), 

 wuutu* (52), It. giga* (65 42'), ScoUcithrix minor (46 46'). 



This list contains a striking numlior of forms which are usually associated with 

 more temperate regions, and, as Dr. Giesbrecht remarks, the failure in agreement with 

 the pelagic species of the ' Belgica ' in very striking, for only two species an common 

 to all collections. Comparing it with the results of the ' Discovery ' the same 

 extraordinary differences are manifest, only four species (C. prvpiiiquw, C. simillimu*, 

 Clausixxtlamis arcuicorni*, Otthona ximilix) being common to both collections. 



In the ' Gauss ' collections, in the area between Kerguelen and the Winter Station, 

 appear a great number of species in execs* of those either of the ' Belgira ' or 

 ' Discovery.' Whereas in the ' Bclgira ' collection occur thirty specie*, of which nine- 

 teen only are pelagic, in the ' Discovery ' collection are twenty-four species of pelagic 

 Copepoda ; but in the ' Gauss ' c-ollection this nuiul>cr in more than doubled, and a 

 Dumber of species occur even in the collections made round alout the Winter Station 

 which are not entirely Antarctic, but extend a long way northwards through the 

 deeper waters of the Atlantic Ocean, and have been brought there prolwbly by southern 

 currents. The species determined, however, show but little agreement with the list 

 enumerated alx>ve. 



The very extensive number of species captured by the ' Gauss ' naturalists is 

 probably due to the fact that the tow-nets were used at much greater depths than in the 

 case of either the ' Belgica ' or ' Discovery.' In the former, 500 metres appears to have- 

 been the limit, whereas in the latter the collections may be considered to le practically 

 surface collections. If the tow-net had been used at the depths it was employed on 

 the ' Gauss,' viz., to 3,000 metres, the agreement between the respective captures 

 might certainly have been greater, and the number of species taken greatly 

 increased. 



In the ' Gauss ' collections appear only six species which agree with any of 

 the species referred to above (viz., Aetideus armatwt, Caianua propinquu* and C. 

 simillimus, Clattsocalanus arcuicornix, Oithona sitnili*, Lucicutia fltivicorni*), and when 

 it is remembered that in the ' Belgica ' collection there are only two species, and in the 

 'Discovery' only four species, of the twenty-seven species enumerated by (Jiesbrecht 

 which are in agreement, the conclusion is inevitable either that the captures made by 

 the expeditions mentioned were unusual, or that the identification of species has in some 

 instances been erroneous. That unusual species do appear in these areas, even close to 

 the ice, is shown by the occurrence in the ' Gauss ' Antarctic collections of Corycoeu* 

 (tpecionUf Sapphirina inetallina, Aetideti* artnatu*, Labidocera aeutifroiis, Undtuchaeta 

 major, Arictellu* setofus, and others ; and in the ' Discovery ' collection in Lat 56 

 31' S., Long. 156 19' 30" occurred Eucalanu* subtenui*, and in Lat 49 40' 8., and 

 Long. 172 18' 30" W., Pleuromamnui gracilix, several young Gmdace, Euchceta 

 a HI r inn, and Cejitropagef violnottx, which belong undoubtedly to a subtropical or 

 warm temperate area, and arc to l>c regarded as accidental. 



YOU 1%'. 



