lars, adds that he saw in a tank
at Colonna Corle leeches which appeared to him flatter and of a darker
colour than those described above, but that he had not an opportunity of
examining them particularly.

[Illustration: DORSAL.]

[Illustration: VENTRAL.]

Mr. Thwaites states that there is a smaller tank leech of an olive-green
colour, with some indistinct longitudinal striae on the upper surface;
the crenated margin of a pale yellowish-green; ocelli as in the
paddi-field leech. Length, one inch at rest, three inches when extended.

Mr. E. LAYARD informs us, _Mag. Nat. Hist._ p. 225, 1853, that a
bubbling spring at the village of Tonniotoo, three miles S.W. of
Moeletivoe, supplies most of the leeches used in the island. Those in
use at Colombo are obtained in the immediate vicinity.]

[Footnote 2: _Haemopsis paludum._ In size the cattle leech of Ceylon is
somewhat larger than the medicinal leech of Europe; in colour it is of a
uniform brown without bands, unless a rufous margin may be so
considered. It has dark striae. The body is somewhat rounded, flat when
swimming, and composed of rather more than ninety rings. The greatest
dimension is a little in advance of the anal sucker; the body thence
tapers to the other extremity, which ends in an upper lip projecting
considerably beyond the mouth. The eyes, ten in number, are disposed as
in the common leech. The mouth is oval, the biting apparatus with
difficulty seen, and the teeth not very numerous. The bite is so little
acute that the moment of attachment and of division of the membrane is
scarcely perceived by the sufferer from its attack.]

[Footnote 3: Even men are not safe, when stooping to drink at a pool,
from the assault of the cattle leeches. They cannot penetrate the human
skin, but the delicate membrane of the mucous passages is easily
ruptured by their serrated jaws. Instances have come to my knowledge of
Europeans into whose nostrils they have gained admission and caused
serious disturbance.]

ARTICULATA.

_APTERA_.

Thysanura.

Podura _albicollis_.
_atricollis_.
_viduata_.
_pilosa_.
Achoreutes _coccinea_.
Lepisma nigrofasciata, _Temp. nigra_.

Arachnida.

Buthus afer, _Linn_.
Ceylonicus, _Koch_.
Scorpio _linearis_.
Chelifer librorum.
_oblongus_.
Obisium _crassifemur_.
Phrynus lunatus, _Pall_.
Thelyphonus caudatus, _Linn_.
Phalangium _bisignatum_.
Mygale fasciata, _Walck_.
Olios taprobanius, _Walck_.
Nephila...?
Tr