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bulletin: museum of comparative zoology. 



York. There is a decided difference in size between northern and 

 southern specimens, those from the Guh' of Maine being much the 

 larger. This seems to be the general rule with this wide ranging spe- 

 cies. And probably it is separable into distinct races, a northern and 

 a southern. 



Fig. 71. — Distribution of Sagittae, July-August, 191.3. 



o, Sagitta elegans; E, S. enflata; h, S. he.xaptera; l, S. lyra; s, S. serrato- 

 dentata; h, Eukrohnia hamata. 



Nortliern limit to S. serratodentata, , northern limit to S. enflata; 



..... southern limit to S. elegans. 



The occurrence of Sagitta enflata, S. hcxaptcra, and PtewsagiUa draco 

 has been noted; they were all confined to southern stations. And 

 this was also true of Sagitta bipundata. The captures of the latter 

 deserve emphasis because it is only recently that this species has been 



