Verrill, A. E. (1872). Descriptions of North American fresh-water Leeches [Art. XIX. Brief Contributions to Zoology from the Museum of Yale College. No. XVll.]. The American journal of science and arts. (series 3) 3(13): 126-139.
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Verrill, A. E.
1872
Descriptions of North American fresh-water Leeches [Art. XIX. Brief Contributions to Zoology from the Museum of Yale College. No. XVll.]