316 DR. W. BAIRD ON NEW ANNELIDES. [May 13, 
than in maculata, and tubercular. Oral sucker moderate in size; 
ventral circular, radiately plaited internally and granulous externally. 
Length of body about 3 inches, greatest breadth about 4 lines. 
Hab. Hong-Kong, China (Sir A. Smith, M.D.). 
A species has been described by Blainville from a drawing made 
by a native artist in the Chinese ‘ Encyclopaedia,’ and named | by him 
Hirudo.sinica. This Leech is said to be employed medicinally in 
China. It is small and entirely black, which would show it to be a 
different species from that found in Hong-Kong. 
6. Hirupo semicarInaTa, Baird. 
Body rounded, of a uniform dark olive-colour above and beneath, 
slightly narrower at anterior extremity. Rings narrow, with a few 
tubercles on the surface. Oral sucker round, with scarcely any lip, 
but plaited round its margin; ventral sucker moderate, indistinctly 
plaited on internal surface. Anus small. The anterior half of the 
body is marked on the dorsal surface with a sort of raised keel. 
Length of body 16 lines, breadth of body about 3 lines (largest 
specimen). 
Hab. Vancouver Island a K. Lord, Esq.) ; Great Bear Lake, 
N. America (Sir J. Richardson, M.D.). 
7. Hrrupo Leavis, Baird. 
Body depressed, flat ventrally, slightly convex dorsally, attenuated 
anteriorly. Of a uniform dull yellowish colour above and beneath: 
No bands or marks to be seen, unless an indistinct continuous band 
on each side dorsally. Rings quite smooth ; the lower margin of each 
raised somewhat like a keel; and on the edges at the sides the rings 
are as it were divided into two, but only on the edges. Oral sucker 
small; ventral rather small, radiately plaited. 
Length 4} inches, greatest breadth about 9 lines. 
Hab. ? Old collection*. 
Genus HeTEROBDELLA, Baird. 
Body composed of 160 rings. Male organ situated between the 
twenty-ninth and thirtieth ring; female between the forty-eighth 
and forty-ninth. Eyes five pairs—three situated on first ring, one 
on second, and one on fifth. Anus rather small, round, and distinct, 
situated between the fourth and fifth last ring, in the centre, a little 
above the ventral sucker, which is obliquely terminal, and so placed 
as to have a ventral aspect. 
* A cargo of Leeches was lately imported into London from Australia; but, 
the demand for Leeches being now much restricted owing to the disuse of blood- 
letting by medical men in this country, it appears that they were almost all 
thrown into the Thames. Three or four specimens, however, were saved from 
the mass, and kindly sent alive to the British Museum by Mr. Morson of South- 
ampton Row. This Leech is one which is used in Australia for medicinal pur- 
poses ; and a dissection of the mouth shows the teeth to be strong and well deve- 
loped. The species is the Azrudo quinquestriata of Schmarda, and described 
by him in his ‘ Neue Wirbelthiere,’ vol. ii. 
Ke 
ay 
