544 Illinois State Laboratory of Natural History. 



1900. A Description of Microbdellabiannulata with especial regard 

 to the Constitution of the Leech Somite. Proc. Acad. Nat. Sci. 

 Phila., 1900. pp. 50-73. 



Moquin-Tandon, A. 

 '46. Monographic de la famille des Hirudinoes. Paris, 2d ed., 1846. 



Philippi, R. A. 

 '72. Macrobdella, ein neues Geschlecht der Hirudineen. Zeitsch. fur 

 die gesammt. Naturwiss. (2), Bd. VI., pp. 439-442. 



Say, Thomas. 

 '24. Narrative of Expedition to the Source of the St. Peter's River, 

 etc., Vol. II., Appendix, pp. 266-268. Philadelphia. 



Verrill, A. E. 

 '74. Synopsis of the North American Fresh-water Leeches. Rep. 

 U. S. Comm. of Fish and Fisheries for 1872-73, pp. 666-689. 



Whitman, C. O. 

 '86. The Leeches of Japan. Quar. Journ. Micr. Sci., Vol. XXVI., 

 pp. 317-416. 



'92. The Metamerism of Clepsine. Festschr. zur 70 ten Geburtstage 

 R. Leuckart's, 1892, pp. 385-395. 



