554 
ENTOZOA. 
with a bag at its posterior extremity; soft, flattened, and some¬ 
what resembling a leech; provided with suckers, of which one 
or more of them serve as the mouth. 
TRIBE II.-CESTOIDEA. 
With sexual organs, or having two ovaries; body elongated, 
frequently with articulations, but not inclosed in a cyst; mouth 
consisting of four trunks, surrounding a proboscis-shaped mamil- 
la, or with small spines in some, and hooks in others. 
Genus BOTHRIOCEPHALUS. —Rudolphi. 
Generic Character. —Body greatly elongated, much depressed, 
and consisting of numerous articulations ; head subtrigonal; tail 
frequently bifurcate; oscula placed in the centre of the articula¬ 
tions on both sides. 
Bothriocephalus latus .— The Broad Tape Worm. 
Plate CIII. fig. 3. 
Articulations of the body broader than long, minutely papil¬ 
lose, with an osculum in the middle of each articulation; the 
head is small, and the tail frequently bifurcated. From 15 to 
20 feet long. Inhabits the human body. 
Genus TiENlA.— Linnaeus. 
Generic Character .—Body elongated, depressed, and consist¬ 
ing of many articulations, each of which is furnished with an 
osculum on both sides, in the centre of the edges; the head pro¬ 
vided with four sucking oscula. 
Tania solium. — The Common Tape Worm. 
Plate CIII. fig. 2. 
Mouth terminal, surrounded by two rows of radiate hooks; a 
little below it is provided with four tuberculate suckers ; colour 
yellowish-white. Sometimes grows to forty feet long. Inhabits 
the human intestines. 
TRIBE III.-CYSTICA. 
Animals inclosed in a cyst, sometimes solitary, at others con¬ 
gregated, and not unfrequently in many groups ; body generally 
wholly or posteriorly vascular. 
