III. Faunistic. 



a. DISTRIBUTION OF SPECIES WITIUN THE AREA OF THE EXPEDITION. 



I. Horizontal dist ribii tic n. 



a. As the result of plotting the various captures on the track-chart, no evidence was 

 obtained that any species was confined to a particular district, nor that any district was poorer 

 in species than another. In other words, the Chaetognath fauna was approximately evenly 

 distributed in the various seas traversed by the Expedition (Celebes Sea, Banda Sea, etc). 



[5. For the consideration of another question, namely, the effect of the neighbourhood 

 of land upon the fauna, all hauls ') containing Chaetognaths were divided into three groups: 

 42 neritic hauls, made in harbour or close to land; 20 hauls fairly close to land, but over 

 deep water; and 9 'oceanic' hauls made at a distance of more than 40 miles from land. lUit 

 really 'oceanic' conditions, which include entire independence of the effects of land drainage, 

 are hardly possible in an archipelago (this point will be discussed below). 



The number of occurences of each epiplanktonic species in each of the three groups 

 was then calculated as a percentage of the total hauls in that group, and yielded the figures 

 in the table followinsr : 



The conclusion to be drawn from this table is that all the.se epiplanktonic species were 

 fairly evenly distributed over the entire area investigated, irrespective of the di.stance from 

 shore (never very great), with the apjjarent excejition of pulchra which failed entirely at the 

 9 'oceanic' stations more than 40 miles from land. 



1) Excluding 107 (drcdgc); 35, 175, 208, aio^' (irawl); 216 (iiiesoplankton net); and 142 (2) in which most of the matciial 

 was rotten and unidcntiliable. 



