100 BOARD OF AGRICULTURE. 



or proboscis. The neck is short and thick, transversely 

 plicated, and the reproductive organs are in a single series on 

 one edge. If in considerable numbers, this species may pro- 

 duce serious symptoms, such as loss of flesh, tight skin, loss 

 of strength and spirit, and general debility. 



The Sheep Tape-worm ( Tcenia expansa Rudolphi) . 



This species, which is found both in sheep and cattle, grows 

 to the length of eight or ten feet, varying in breadth from a 

 quarter of an inch to upward of an inch, in large specimens. 

 The head is very small with four suckers directed forward, 

 and close together. The neck is scarcely distinct, or very 

 short. The posterior border of the joints are uneven, divided 

 up into rounded lobes and notches, or wavy. The reproduc- 

 tive organs are double, opening on each edge of every joint. 

 Its young stage is unknown, and consequently the source 

 from which the sheep obtain it. It does not appear to be very 

 common in this country, judging from the few cases recorded. 

 In Germany it is very common in sheep. It does, without 

 doubt, produce effects in sheep similar to those caused by the 

 tape-worms in man. 



Tcenia cucwnerina Bloch, of the Dog. 



This species is very common in the small intestine of the 

 dog. It grows to the length of ten or fifteen inches up to 

 nearly ten feet, with a width of one-twelfth to one-eighth of 

 an inch. The head is somewhat rhomboidal, with four sucke rs 

 and a central proboscis, which is surrounded by three circles 

 of claw-shaped hooks, the whole number being about 48. 

 The mature joints are elliptical, or shaped somewhat like the 

 seed of a melon or cuciimber. From this peculiarity it takes 

 its name. There are two genital orifices to each joint, one 

 in the middle of each edge. The eggs are much fewer in 

 each joint than in most other tape-worms. Its development 

 is unknown. It has been supposed that the larvae live in flies 

 or other insects. 



When in large numbers in a dog, it occasions more or less 

 severe symptoms, especially if associated, as it usually is, 

 with several other species of tape-worms and round-worms. 

 It can be expelled by the same remedies mentioned under 

 some of the previous species. 



