370 ENTOZOA. 
But a single species is known, the Tenia nodulosa, Gm.; 
Getz., XXXIV, 5, 6; Encyc., XLIX, 12—15. It inhabits va- 
rious fishes, the Pike, Perch, &c.(1) 
BoruryocepHaus, Rud. 
Where the only suckers possessed by the head are two longitudinal 
fossulz placed opposite to each other. 
They are found in different Fishes and in certain Birds(2). 
From the Bothryocephali themselves should be distin- 
guished the 
DinoTrHryoruyNcuHus, Blainv. 
Where the summit of the head is provided with two little trunks or 
tentacula bristled with hooks. | 
But a single species is known; it has a short body and inha- 
bits the Lepidopus, Blainv., App. ad Brems., pl. ii, f. 8. 
Fioriceprs, Cuv. 
Where there are four little trunks or tentacula armed with re- 
curved spines by means of which they penetrate into the viscera. 
Certain species—Ruyncnosoturium, Blainy.—have a long, arti- 
culated body destitute of a bladder. 
One species is common in the Rays—Bothryocephalus corol- 
latus, Rud., 1X, 12—that is some inches in length. Its head 
is the exact resemblance of a flower. 
In others again—FiLoricers proper(3)—the body is terminated 
by a bladder into which it withdraws and is concealed. 
. 
(1) Rud., Hist., I, part If, 32, and Synop., 135. 
(2) Rud., Hist., I, p. ii, 37, and El., 136. For the genus Bothryocephalus and 
its subdivisions, see the Zoological Fragments of F. S. Leuckardt, No. 1, Helm- 
stedt, 1819. 
(3) M. Rudolphi has changed this name to AntHoceruatus, El., 177. 
