Notes on Species of North American Oligochaeta.

Abstract

A number of species of Oligochaeta have been collected during the present year (1895) at Havana, Ill., in connection with the work of the University of Illinois Biological Experiment Station.  Detailed accounts are given for five species of Oligochaeta, including new information on Enchytraeus (Halodrilus) littoralis Verrill.  Thinodrilus inconstans n. gen. et  n. sp. and Fredericia agilis n. sp. are described as new.