365 



The folJowing- are the marine zoogeograpliical areas of the 

 present geologic epoch, as given by Ortmaiin ('96, I., p. 66) : 



I, Littoral life-district. 



1. Arctic region. 2. Indo-Pncific region. 3. West 

 American region. 4. East American region. ."). West 

 African region. (>. Antarctic region. 



II. Pelagic life-district. 



1. Arctic region. 2. Indo-Pacitic region. 3. Atlantic 

 region. 4. Antarctic region. 



III., IV. Abyssal life-districts. 

 No reu'ions distinu-nishable. 



LITERATURE. 



A<>-nssiz, A., '6VS.— Three ("rnises of the "Blake." 2 Vols. 

 (Bull. Mas. Comp. Zool., Vols. XIV.. XV. ) 



Chawberlin, T. (\, '98.— A Systematic Sonrce of Evolntion 

 of Provincial Faunas. (Journ. Geol., Vol. VI., p. 597. ) 



Chun, Carl, \S(). — Ueber die geographische Verbreitung der 

 pelagisch lebenden Seethiere. (Zoolog. Anzeiger, Xr. 

 214, 2L5.) 



Chun, Carl '88. — Die pelagische Thierwelt in grosseren 

 Meerestiefen und ihre Beziehungen zu der 01)erflachen- 

 Fauna. (Bibliotheea Zoologica, Heft I. ) 



Chun, Carl 'Ui).— D'\e pelagische Thierwelt in grossen Tiefen. 

 (Verhandl. d. Gesellschaft deutsch. Xaturfr. und Aerzte. 

 Bremen, 1890.) 



Conn, H. IF.. '(^.5. — Marine Larviie and Their Relation to 

 Adults. (Stud. Biol. Lab., Johns Hoi)kins Fniv., Vol. 

 III., pp. 165-192, Pis. Vlll. and IX. ) 



Ball, William H., '.W.— Deep Sea Molluscs ;ind the Condi- 

 tion Lender Which They Live. (Pres.^Addr. Biol. Soc, 

 Wash. Proceed., Vol. V., pp. 1-27.) 



