1. Monographie de la famille des hirudinées. Paris. 1846.
2. Major Long's Second Expedition to the Source of St. Peter's River, vol. ii, Appendix to the Natural History. 1824.
3. Synopsis of the North American Fresh-water Leeches. U. S. Fish Commissioner's Reprot for 1872-74. (Refers to the American Journal of Science. Vol. iii. 1872.)