M 



Plate 1. Leeches cf the Palisades Interstate Park 

 Dorsal (left) and ventral (right) views of each species of leech 



A, Helobdella stagnalis C. Macrobdella decora F. Erpobdella punctata 



B. Glossiphonia complanata D. Placobdella parasitica G. Haemopis marmoratis 



E, Haemopis grandis 



