THE A\NALS 



AND 



MAGAZINE OF NATURAL UISTORY. 



[SEVENTH SERIES.] 

 No. 40. APRIL lUOl. 



XL. — On the Mutual Relations of the Arctic and the Antarctic 

 Faunas*. A Lecture hy Professor Dr. Georg Pfeffkr, 

 "Gustos of the Museum in Hamburg. 



In resj)onse to repeated invitations, I have undertaken to 

 deliver this lecture on the relations of the faunas of the hio-her 

 northern and southern latitudes ; and in doing so it is my 

 intention to submit to you not detailed observations but 

 general reflections. 1 shall therefore bring the subject before 

 you in a setting of general historical geography, but at the 

 same time I shall touch upon all the theories which iiave 

 been published, without, however, mentioning by name the 

 various authors or giving the text of their conclusions. I 

 l)ave to ask you to take my lecture for what it is intended — 

 an orienting introduction for tho.^^e who have a practical or 

 general interest in a study which is at present attracting so 

 much attention — the investigation of the highest latitudes 

 of our earth. 



Descriptive. 



According to temperature, the surface of the ocean may be 

 divided into three natural regions : first, the tropical region, 

 with a high tem|)erature whicii varies but little throughout 



* Translated by Margaret II. Thouison from " Uubor die gegenseitigen 

 Beziehungeu dor arkti.scheu uiid autarktLscbuu Fuuua," \'erh. deutsch 

 zool. Ges. ix. (1899) pp. 2(!G-2«7. 



Ann. ct- Muff. N. Hist. Ser. 7. Vol. vii. 21 



