PARENCHYMATA. 365 
of those species which have a slight tubercle or swelling, anteriorly 
armed with hooks(1). 
Hotostoma, Nitz. 
Where one half of the ,body is concave, and so arranged as to act 
altogether like acup. Their orifices appear to be similar to those 
of Distoma. 
They inhabit certain Birds. One species is found in the Fox. In 
Portystoma, Zed., 
Or rather Hexastoma, the body is depressed, smooth, and furnish- 
ed with six cups arranged in a transverse line, under the posterior 
margin. The mouth appears to be at the opposite extremity. 
They have been found in the urinary bladder of Frogs, in the 
ovary of Woman, on the branchiz of some Fishes(2), and in 
the nasal cavity of certain Tortoises. 
CycLocoryLg, Otto. 
Where there are eight cups forming an almost complete circle, un- 
der the hind part of the body, which is broad; there is a small pro- 
boscis anteriorly. 
C. belone, Otto, Ac. Nat. Cur. XI, part II, pl. xli, f. 2. The 
only species known; it is very small, and was taken on the back 
of the Belone vulgaris. * 
There is another subgenus that approximates to Fasciola, which 
i have named 
Tristoma, Cuy. 
The body forms a broad and flat disk; on the posterior part of its 
inferior surface is a large cartilaginous sucker which is only con- 
(1) The genus Ecninostoma of Blainville. 
(2) Polyst.integerrimum, Rud., pl. vi, 1—6, genus Hexaturirepra, Trentler;— 
P. pinguicola;—P. thynni, Laroche, Nouv. Bull. de Sc., May 1811, pl. ii, f. 3, 
genus Hexacotyte of Blainyille;—Pol. midas, Kuhl and Van Hasselt, Allg. Koust. 
en Latterbode, No. 6, and the Bullet. des Sc. Nat. de Féruss., 1824, vol. IL, p. 310. 
é! 
