PACIFIC INFLUENCE 



17 



PACIFIC INFLUENCE IN THE ANTARCTIC 

 The presence of species of Pacific origin was observed and commented on in the 

 Falklands report (p. 297). They were almost entirely lacking in South Georgia, 

 Hvperammina novae-zealandiae and Bolivina decussata being the only noticeable records. 

 But as soon as the Antarctic records were analysed it became evident that many species 

 were being found which had no previous Antarctic history, yet were known from 

 Australian and New Zealand areas. 



The genus Lagena offers the greatest number of instances, probably because it is by 

 far the largest genus, with several hundred so-called species, many of which are at home 

 in all latitudes and at all depths. Others having a very limited distribution form suitable 

 subjects for comment. Fortunately we know a great deal about the Lagenae of deep 

 water in the south-west Pacific, Sidebottom having published two papers (S. 1912, etc., 

 LSP) illustrating the Lagenae found in soundings made by H.M.S. 'Penguin', 

 'Waterwitch' and 'Dart' in the area between 3° 51' to 43° 05' S and 149° 39' E to 

 158° 21' W. He figures and describes about 180 species and varieties including many 

 novelties, some of which are known only from his papers. At least seven of his new 

 forms are to be found in Discovery material, besides many others which he records from 

 the south-west Pacific, but which are also known from other localities. The seven are: 



Discovery 

 no. 



305 

 311 

 324 

 375 

 399 



404 

 411 



L. alveolata var. separam, also recorded at the Falklands (F 246) 



L. auriculata var. arcuata 



L. compresso-marginata 



L. orbignyana var. unicoslata, also recorded by Terra Nova (No. 366) from the Antarctic 



L. stelligera var. ecceiitrica, also recorded by Terra Nova (No. 305) from New Zealand, the 



Antarctic and Tierra del Fuego 

 L. striatopunctata var. complexa 

 L. virpulata 



While dealing with the genus Lagena it is instructive to compare the Discovery 

 species with those recorded by the 'Terra Nova'. Disregarding the species known to 

 have a wide distribution I find many common to the two lists. 



