Hirudinea. 
The single specimen is rather small, not much contracted ; in life it was of a 
beautiful green colour characteristic of the species. 
8. Glossiphonia lata, Oka (1910). 
Locality. Sta. 13, lower surface of stones at shore of Chikubushima. Oct. 1-3, 
1915. Nine specimens. 
All are much contracted, being pear-shaped or almost circular in outline. The 
largest specimen measures 6 mm. in length and 5 mm. in width. 
9. Placobdella rugosa (Verrill). 
Syn. Clepsine ornata var. rugosa , Verrill, 1874. 
Placobdella rugosa, Moor, 1901. 
Locality. Zeze, under stones near edge of Lake Biwa. Oct. 3, 1915. One 
specimen. 
The single specimen is 17 mm. long and 9 mm. wide. The number and position of 
the dorsal papillae agree tolerably well with the figures of this species given by Moore 
in his report on the leeches of Minnesota (1912). His description of the colour and 
markings of the living animal applies on the whole, equally well to the present 
specimen. 
10. Hemiclepsts marginata (O. F. Miiller). 
Syn. Hirudo marginata, O. F. Miiller, 1774. 
Glossiphonia marginata, Moquin-Tandon, 1846. 
Locality. Near Soochow, Tong-Dong-Ding, Tai-Hu. Dec. 4, 1915. Four speci- 
mens. 
The largest specimen measures 12 5 mm. in length and 5 mm. in width, others 
are somewhat smaller. They were found parasitic on the tortoise Damonia reevesii. 
II. Hemiclepsis casmiana, Oka (1910). 
Localities, (i) Komatsu, Lake Biwa, "in shell of Anodonta." Oct. 23, 1915. 
Seven specimens. (2) Tai-Hu, "in Anodonta woodiana and Nodularia douglasiae." 
Dec. I, 1915. About twenty specimens. 
Both Japanese and Chinese specimens are mostly small and immature, Only 
one example from Komatsu is full grown, and measures 13 mm. in length and 5 mm. 
in width. 
12. Hemiclepsis siamensis, n. sp. 
Plate VII, figs. 6—8. 
Shape and Dimensions. The general shape of the body is like that of H. marginata, 
being rather long and narrow even in contracted condition, but the head is not per- 
ceptibly broader than the neck. The dorsal surface is strongly convex and the ventral 
concave, so that in cross section the body is crescentic in outline. The margins are 
sharply serrated. The largest specimens measure about 15 mm. in length and 4 mm. 
