1918] Michael: Brharior of Solpa democratica 267 



This list shows that as the distance from the coast increased the 

 number of hauls made in the cold water relative to those made in warm 

 water, as a rule, also increased. According to the hypothesis under 

 consideration, this might lead to an excess of aggregate forms in the 

 colder water and an excess of solitary forms in the warm water and so 

 account for the differentials. 



But, as shown by table 9, the excess of warm water hauls in sections 

 39in, 40^0, 41s, 42.S, 429, and 49i„ together with the excess of cold water 

 hauls in sections 40io, 43ii, 44i^, 45io, 45i._., and 50^.^ can not account 

 for the differentials in question, for the reason that the differentials 

 are revealed by table 6C as well as by table 4, and none of the hauls 

 involved in table 6C were made in these sections. Similarly, the excess 

 of warm water hauls in sections 40ii and 52i,,, together wdth the excess 

 of cold water hauls in 46,,, 53i„ and 61- can not account for the differ- 

 entials because none of the hauls involved in table 6B were made in 



Table 9 



Distribution of hauls involved in tables 5 and 6 with respect 

 to position 



Table 5 Table 6A Table 6B Table 6C Table 6D 



