The Leeches of Japan. 
By 
Cc. 0. Whitman, Ph.D. 
With Plates XVII, XVIII, XIX, XX, and XXI. 
PART, 
THE TEN-EYED LEECHES, OR THE HIRUDINIDA. 
Tuer material for a study of the Leeches of Japan, including 
the land, freshwater, and marine Leeches, was collected during 
my connection with the University of Tokio (1879—1881). 
The coloured drawings were executed by a young Japanese 
artist, Mr. Nomura, who has spared no pains in making them 
exact copies of the living objects. Attention to the minutest 
details, infinite patience, a trained eye, and a remarkably 
skilful brush, gave results that are certainly marvels for neat- 
ness and accuracy. 
For the assistance of Mr. Nomura I am indebted to Mr. 
Kato, president of the University ; and for this and other aid 
my hearty thanks and grateful appreciation are due. 
The ten-eyed Leeches, embracing Hirudo, Aulostoma, He- 
mopis, Macrobdella, and some other genera, form a natural 
division of the Leech tribe, which may, for the present, be con- 
veniently called the Hirudinide. The remaining families, 
the Nephelidez, Clepsinidz, Branchellide, Branchi- 
obdellide, will be treated in separate parts. 
The part here presented embraces a description of the Land 
Leech, the Medicinal Leech, and three species of toothless 
VOL, XXVI, PART 5.—NEW SEK Y 
