314 DR. W. BAIRD ON NEW ANNELIDES. [May 13, 
tenuated anteriorly, broadest about the centre. Colour of a light 
olive, uniform underneath, but marked with irregular black spots on 
the back. Rings rather narrow, with an indistinct keel along both 
dorsal and ventral surfaces of each. Oral sucker rather small, 
ventral large. Anus large. Teeth on the jaw nearly black. 
Length of body (in spirits) 3 inches, breadth (at broadest part) 
9 lines. 
Hab. Cuba? From the collection of the late Mr. John Christy, 
F.R.S. &e. 
2. AULASTOMA EXIMIO-STRIATUM, Baird. 
Body flattened, especially on the ventral surface, slightly at- 
tenuated at each extremity, but more so anteriorly ; broadest about 
the centre. Back olive-coloured, speckled with black spots or marks 
scattered profusely over the surface ; ventral surface of a uniform 
colour, lighter than the back. Rings very distinct, particularly well- 
marked at the sides, which appear as if crenate; on the back they 
are marked with very numerous, minute fine striz, which are best 
seen when the specimen is taken out of spirits. Oral sucker small ; 
ventral moderate and rather deep, granose on outer edge. Anus large. 
Length about 2 inches, breadth about 8 lines. 
Hab. ? Old collection. 
Genus Hirupo, Linneeus. 
1. Hirupo rnconcrinna, Baird. 
Body much depressed, of a uniform dark olive-colour, somewhat 
lighter underneath, much attenuated at anterior extremity. Body 
broad posteriorly, coarsely annulated; surface of rings roughly 
wrinkled. Oral sucker small; ventral large, shallow, bordered with 
a smooth margin, distinctly radiately plaited on interior surface, and 
covered with flat granulations externally, or as it were tessellated. 
Breadth of anterior portion immediately below the oral sucker 
3 lines, breadth at broadest part of body 9 lines ; diameter of ventral 
sucker 5 lines; length of body 4 inches. 
Hab. Ceylon (Sir A. Smith, M.D.). 
Several species of Leeches are found in Ceylon, and are particu- 
larly mentioned by the late Sir J. E. Tennent in his history of that 
island. This may be the Leech mentioned by him in vol. i. p. 305 
(footnote), which was observed by Mr. Thwaites at Kolona Koole, 
but which he was not able to examine particularly. He describes 
it “as flatter and of a darker colour” than the paddy-field Leech“ 
(Homopsis sanguisorba) of Ceylon. 
2. Hrrupo towet, Baird. 
Body depressed, concave on ventral surface, slightly convex dor- 
sally, of a uniform olive-colour, rather lighter underneath. No 
bands or marks on the surface to be seen. Attenuated anteriorly. 
Body distinctly annulated ; rings very irregular, contracted at about 
every fourth or fifth, the.fourth or fifth being smaller than the rest, 
