228 CLASS VII. 
OKEN’s Jsis, 1817, s. 881 (with fig.), the same 1818, s. 2080; KNoLzZ 
(see p. 226); Branpr Mediz. Zool. 11. 1833, s. 230—297; Moquin-TaNDON 
Monographie des Hirudinées, &e. 
Amongst the foreign species we note Hirudo zeylanica, found in the 
Island of Ceylon ; its poisonous bite is followed by very tedious ulcers. 
TytLer, Edinb. new Philos. Journ. 1826, p. 375. 
B. Acetabulum of the mouth of a single segment, distinct 
from the rest of the body by stricture. 
Hemocharis Say., Piscicola Buainy., LAM. Body cylindrical, 
attenuated forward, with few rings, little distinct. Anterior aceta- 
bulum slightly excavate, with mouth triangular, edentulous, placed 
in the bottom towards the inferior margin; posterior acetabulum 
large, obliquely terminal. 
Sp. Hemocharis piscium, Hirudo geometra Li., ROESEL Jns. 111. Tab. XXXII. ; 
Luo, Ueber einige ausgezeichnete anatomische und physiologische Verhdltnisse 
der Piscicola geomcra, MUELLER’S Archiv. 1835, 8. 419—427, Taf. x1. This 
species lives in fresh-water and adheres very firmly to Carp, Tench, &c. 
It moves like a geometrical caterpillar ; on the back-side of the cephalic 
disc are four black eye-spots ; copulation occurs in the upright position, in 
which the animals support themselves on the ventral disc and embrace in 
form of an X. They lay eggs of a yellow-brown colour, three-fifths of a 
line long. 
Piscicola respirans TROSCHELL, new species, Archiv f. Naturgesch. XVI. 
1850. 
Pontobdella Lracu, Lam., Albione Sav. Body cylindraceo- 
conical, attenuated forwards, with unequal rings. Acetabula very 
concave; mouth small unarmed, placed at the bottom of the anterior 
acetabulum ; posterior acetabulum exactly terminal. 
These animals live in the sea and adhere to different fishes, especially to 
Rays. Most of the species are beset with nodes or with warts on the 
rings, which are flatter in Pontobd. verrucosa, BAasTER Natuurk. Vitspan- 
ningen I. Tab. X. fig. 11., more pointed in Pontobd. muricata Leacn. In 
others these nodes are entirely absent, as in Pontobd. lubrica GRUBE; eyes 
seem not to be present. 
OrveER III. Setigera. 
Body annulate, provided with sete or with setigerous rudiments 
of feet. External branchize in most. 
A, No external organs of respiration (Abranchia). 
Family IV. Lumbricint. Branchie none. Body provided with 
sete, without rudiments of feet. 
