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REPORT ON ZOOLOGY, MDCCCXLII : 
formerly given by him as new, Clepsine sanguinea. Its intestines pos- 
sess nine red lateral close sacs, which are forked at their closed end ; 
and its two eyes form oblong somewhat irregular spots. The species 
has some resemblance to Clepsme paludosa, but is not so pointed ante- 
riorly, and especially, is not so soft as it. It also differs, by its bluish 
green colour, from the dark green Clepsine. It has the habits of Clep- 
sine complanata, and readily attaches itself to stones and mussels. Of 
the internal structure of the Clepsine, which is fully described, we may 
notice particularly, that De Filippi recognised a direct connection be- 
tween the digestive canal and the system of blood vessels, by which the 
blood sucked by the leech from the mollusca, after a short stay in the 
intestines, passed immediately into the blood-vessels ; and these animals 
thus gained their supply of blood by transfusion. The same peculiarity 
also exists in Hcemocharis ; but not in Sanguisuga, Hcemopsis, nor in 
Nephelis, which gorge whole animals as well as blood. 
Wahlberg has described a new leech, which, in Sweden, supplies the 
place of the medicinal one (Froriep’s Neue Notizen, Bd. 23, p. 296). 
The ground colour of its strong warty skin is black brown, with six 
broad coal-black dorsal stripes, and small white points standing round 
the body, on each fifth segment. Its egg capsule is formed like that of 
the medicinal leech. Some observations are given upon this by We- 
deke (Fror. Neue Notiz. Bd. 21, p. 183). The leeches, when they wish 
to lay their eggs, leave the water, and creep many yards away, to seek a 
comfortable bed under moist loose earth. Here they emit, from their 
swollen maw, a slimy green coherent fluid, through which they trail the 
body as far as the sexual aperture. They lay their eggs in this viscous 
matter, and glue, with the saliva flowing from their mouth, a paste 
round about the egg capsule, which hardens and forms the well-known 
spongy covering. When this is done, each leech draws itself backwards 
out of the egg capsule, and twists its two sexual apertures together. 
The copulation of Hirudo piscium has been observed by Brightwell 
(Ann. Nat. Hist. ix. p. 11, and Fror. Neue Notiz. Bd. 22, p. 65). Ac- 
cording to him, a white substance was perceived in the neighbourhood 
of the sexual openings ; the eggs, which these leeches attached to the 
sides of a glass vessel, were very small, oblong oval, hard, of a reddish- 
brown colour, having longitudinal elevated ridges on the sides. In each 
egg, which was covered with a white filmy web-like secretion, was pro- 
duced one young one, with four eyes, on the thirtieth day. This was 
ascertained by detaching an egg, and keeping it in a glass by itself. 
Besides this leech, Brightwell observed, in the fresh-waters of England, 
the following : — Hcemopsis sanguisorba, Sav. ; Sanguisuga medicina- 
lis, Sav. ; Nephelis vulgaris, Sav. ; Nephelis tesselata, Blainv., the 
abdomen of which was covered with young to the number of 143 ; Clep- 
sine complanata and hijalina. 
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