Template:Say, 1824

• Say, T. 1824. D. Class Vermes. Order Cryptobranchia. Hirudo. In: W.H. Keating, (ed.) Narrative of an expedition to the source of St. Peter's River, Lake Winnepeek, Lake of the Woods, Volume 2. Philadelphia: H.C. Carey and I. Lea. Pp. 266–268. BHL  
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Nomenclatural acts

• Date of publication: 1824

New names

(List may be incomplete)

• Hirudo parasitica