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Title:An American Terrestrial Leech
Author(s):Forbes, Stephen Alfred
Subject(s):American terrestrial leech
Normal, Illinois
NcLean County, Illinois
Abstract:Our common land leech was first obtained by me in April, 1876, at Normal, McLean County, Illinois, where it was dug up in a house garden, about a dozen rods from the nearest rivulet. An example sent the following year to Prof. A. E. Verrill, with some remarks on its superficial characters, was by him identified provisionally and with some hesitation as his Semiscolex grandis, originally described* from three aquatic individuals obtained from Lake Huron, Lake Superior, and West River, Connecticut. I have now, however, fifty-six specimens of this leech, all from the earth in Central Illinois, some of them half a mile or more from water, and representing collections made at different times from April, 1876, to June, 1890 ; while, on the other hand, it has not once occurred in the course of a large amount of aquatic work done in the same regions during these fifteen years. It has, moreover, constant characters which clearly distinguish it from Semiscolex qrandis as far as one may judge by a comparison with Verrill's description, and I do not doubt that it is distinct.
Issue Date:1890
Publisher:Champaign :Illinois Natural History Survey
Series/Report:Illinois Natural History Survey Bulletin; v. 003, no. 08
Rights Information:Copyright 2009 University of Illinois Board of Trustees. All rights reserved.
Date Available in IDEALS:2014-11-05

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