222 



MK A. PRINULE JAMKSON ON THE 



Thus the collection is divided into two sections, one a general collection from the 

 colder waters of the South Atlantic and Antarctic Seas, the other a series of surface 

 tow-nettings made in tropical and sub-tropical Atlantic waters. These two sections 



Chart showing average limit of Moating ice in the Atlantic Ocean and Stations to the south of which 



Chfi'tognatha were obtained. 

 S = Station. D = Depth in fathoms. 



prove on examination to be more than a merely convenient grouping of the methods 

 of capture they form two distinct sets of species : the species which occur in the 

 Antarctic samples not occurring in those from the warmer seas, and those taken in 

 the warmer waters of the Atlantic never being found in the Antarctic collections. 

 Doubtless the fact that only a small number of Chsetognatha were obtained from 



(BOY. soc. PTDTN. TRANS., VOL. xi.ix., 980.) 



