REPORT ON THE FORAMINIEERA. 
779 
TABLE IV.— 1 THE SHALLOW-WATER FORAMINIFERA OF HIGH 
LATITUDES— NORTH AND SOUTH. 
The first division of Table IY. embodies the results of the examination of the most 
southerly shallow- water dredgings taken during the Challenger cruise — all those, namely, 
south of about lat. 50° S. The list embraces 137 “species,” the salient genera being 
Biloculina, Miliolina, Reophax, Haplophragmium, Ccissidulina, Lcigena, Uvigerina, 
Globigerina, Pullenia, Truncatulina, Nonionina, and Polystomella. 
The physical and biological conditions of the Southern Ocean differ greatly from 
those of similar latitudes in northern seas ; and the comparative absence of land south of 
lat. 45° S. gives a peculiar interest to the marginal fauna of Kerguelen Island, Heard 
Island, the Falkland Islands and similar localities. 
The Stations included in the first section of the Table yield the nearest approach we 
have to a view of an antarctic shallow- water fauna. It is unfortunately impossible to 
furnish any precisely corresponding series from the northern hemisphere for purposes of 
comparison ; but, notwithstanding the difference in actual latitude, a number of interesting 
facts are brought to light by the collateral tabular arrangement of the Foraminifera from 
similar depths in the Arctic Seas. 
The second division of the Table forms a summary of what is known concerning 
the distribution of Foraminifera within the Arctic Circle ; or, more strictly, between 
lat. 65° and 83° 19' N. It comprises 111 “species,” the prominent generic types 
being the same as the foregoing, omitting Pullenia and adding Polymorphina and 
Textidaria. 
Comparing the two sections of the Table, it will be found that eleven genera ajDpear in 
the southern division which are absent from the northern ; whilst ten genera occur in the 
northern and not in the southern. These for the most part are represented individually 
by rare examples of a single species ; but there are some exceptions, the most important 
of which are Articulina, Clavulina, and Sagrina in the southern list, and the Textularian 
genera Verneuilina, Bigenerina, and Spiroplecta, together with Polymorphina and Oper- 
culina in the northern series. Judging from a somewhat wider area than that embraced 
by the Table, it appears as though Uvigerina, and its dimorphous modification Sagrina, 
take the place of Polymorphina in southern latitudes, and Clavulina that of Bigenerina ; 
whilst the porcellanous forms display a more varied development. The northern region, 
on the other hand, is much richer in the Textularian types, in Polymorphina ? and 
Nonionince. Taking the entire list, thirty-two genera and sixty species are common to 
both areas. 
