202 PROCEEDINGS OF THE ACADEMY OF [1879. 



Jersey species is very remarkable. Why such a resemblance 

 should exist between two fresh-water crustaceans separated from 

 each other by a salt ocean 3000 miles wide, and nearly a thousand 

 miles of land besides, is a problem yet to be solved by chorologists 

 and biologists. Indeed, the distribution of both branchipods and 

 phyllopods in general, is not a little singular, and all those who 

 have the opportunity of acquiring any data in regard to the sub- 

 ject should be careful to put them on record. 



