ENTOZOA. 
553 
O.ryurus angulata. — The Anculated Maw-Worm. 
Elate CIT. fig. G- inale ; fig. 5. the female ; both the size of nature. 
Head obtuse, body thick, tapering from about the middle to 
the tail; pale horn colour. Inhabits the human body. Lately 
discovered by Captain Thomas Brown. Three specimens are in 
the Museum of Dr Macintosh of Edinburgh. 
Genus ASCARXS.— Linnccus. 
Generic Character. —Body long, elastic; attenuated at both 
extremities. 
Ascaris lumbricoides. —The Long Round Worm. 
Plate CII. fig. 7. male. 
Cylindrical, tapering to the two extremities, and annulated ; 
flesh-coloured. From 10 to 15 inches long. Inhabits the hu¬ 
man body. 
Genus STRONGYLUS.— Cuvier. 
Generic Character. —Body long; elastic; tapering to both 
extremities ; mouth orbicular, or angulated ; the point of the 
tail in the male terminated by a funnel-shaped process, in which 
the organs of generation are situated. 
Strongylus gig as .— The Great Strongylus. 
Plate CII. fig. 12. natural size; 11. magnified. 
Head obtuse, tapering towards both extremities; body com¬ 
posed of annular rings. Inhabits the human body. Strongylus 
found in human urine, Plate CII. 14 and 15. 
ORDER II _ ELMINTIIAPROCTA. 
Worms which inhabit the interior of the bodies of other ani¬ 
mals ; with the sexual organs united in each individual; having 
no floating alimentary sac ; a simple cavity in the anterior, and 
almost or totally destitute of nerves. 
TRIBE I.-HIRUDIFQRMIA. 
With distinct sexual organs ; body not inclosed in a cyst, nor 
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