OV THE HUMAN BODY. -35 



ets or fangs, (77) and which constitute the specific 

 character of this species, as the other species is 

 without them. If the anterior part of the head of 

 this taenia is examined with the microscope, stretch- 

 ing it a little^ the fangs, which are seen hy the naked 

 eye, are extended into a small crown perfectly cir- 

 cular and stellated, in the centre of which is the 

 tube.(78) 



§> XVI. Laterally into a square, open the four 

 lateral canals(79) which traverse the whole length 

 of the worm. (80) The centre of the taenia is also 

 traversed by a canal called the middle c?.nal,(81) 

 which begins near the tube of the head and reach- 

 es quite to the tail, sending ]>ranches to each artic- 

 ulation very much resembling in figure the horns 

 of the stag, and v/hich anasfcomoze in a wonderful 

 raanner, as may be seen by the naked eye in fully 

 formed articulations. (S* ) 



It is not yet clearly decided by naturalists, 

 whether the middle canal of a ring communicates 

 with tlie other, though Winsloic,{hS) Vaiideh'o{8^) 

 and PaUas,{85) affirm t!iat they have injected it 

 through the whole length of the worm. (86) We 

 only know with certaintj^ that the canal contains 

 a humour composed of a globular and albuminous 

 substance : the former has great resemblance to the 

 yolk, (87) and tlie latter to the white of an egg.(88) 



Goeze describes the eggs as enveloped in a 

 yellowish substance, which, macerated in water, is 

 separated into small grains.(89) 



We farther know with certainty tluit in the ar- 



