560 PKOCEEDIj^GS of the NATiOlfAL MUSEUM. vouxxt. 



Family HIKUDINIDzE. 



•HAEMOPIS SAVIGNY. 



24. HAEMOPIS MARMORATIS. 



Hirudo marmorata Say. 

 Not NephcUs marmorata Veruill. 

 Aulaatomum lacustre Lkidy. 

 Semi8colex grandi» Vekrill. 



This determination was made by the examination of what are proba- 

 bly Say's types, recently discovered in the collection of the Philadelphia 

 Academy. Say's species diiiers from H. sanguisugn Litnueus chieHy 

 in the constitution of somite VI, which in the latter species has, accord- 

 mg to Whitman's figure (7), the three annuli of equal size and without 

 indication of subdivision. H. marmoraiis, on the other hand, has the 

 second and third annuli (twelve and thirteen of the entire series) much 

 wider than the first, and each completely divided into two by a distinct 

 sulcus. Tlie genital pores vary slightly in i)ositioii, as indicated by 

 the conflicting descriptions of Leidy and Verrill. The male jmre is 

 usually situated at the anterior border of annulus thirty-one and the 

 female in thirty-six. 



No. 5033, U.S.N.M. Yellowstone Park ; C. Hart Merriam ; Ilayden's 

 expedition, 1872. Eleven specinens. 



No. 670, U.S.N.M. Havre de Grace; Milner, 1877. Three speci- 

 mens. This is var. iriijris Verrill. 



No. 5034, U.S.N.M. Marsh, Leavenworth County, Kansas; Orsen 

 Pattee. One specimen. 



No. 441)8, U.S.N.M. Bristol Bay, Alaska; C. L. McRay, September 

 27, 1883. One specimen. 



^ 25. HAEMOPIS LATERALIS. 



Hirudo latcralia Say. 

 Semiacolex. terrcHtris Forbes, 



The type of Say's species was recently discovered in the collection of 

 the Philadelphia Academy. 



The sixth somite of H. lateralis consists of five annuli; the sexral 

 pores are consequently two annuli further back than in 11. marmoratis. 

 Say's specimens were all aquatic, Forbes's all terrestrial. 



No. 4102, U.S.N.M. Olney, Hlinois; July, 1885; .1. and C. Walker. 

 One specimen. 



No. 625, U.S.N.M. Keelfoot Lake (small creek), near Idlewild 

 Hotel, Obion County, Tennessee; Ed. Palmer; 1882, One specimen. 



LIMNOBDELLA R. Blanchard. 

 26. LIMNOBDELLA MEXICANA R. Blanchard. 



No. 202, U.S.N.M. Quanajuata, Mexico; Prof. A. Dugcs. Three 

 specimens. 



