178 The Farmer'' s Veterinary Adviser. 



Svnne suffer severely from a thorn-headed worin (Ecliin- 

 orjnchus Gigas) from three to eighteen inches long; a 

 hair-he.aded worm (Trieocephalus Orenatus) a little 

 smaller than the ruminant's ; an asearis (A. Suilla) like 

 that of ruminants ; the Sclerostomum Dentatum, three to 

 five hues in length, and the Trichiua Spiralis, one-eight 

 eenth to one-sixth iach long. 



Y\%. 32. Fig. 34. 



Fig. 32 — Head of Dog's Tape-worm (T. Cucumerina). Larval form in the 

 dog-louse (Tricliodectes Cani). Fig. 33 — Head of Dog's Tape-worm (T. 

 Marginata). Fig. 34 — Cyst of same (Cysticercus TenuicoUis) infests rumi- 

 nants, omnivora, etc. Fig. 35 — Asearis Marginata, nat. size. Fig. 36- - 

 Asearis Mystax, nat. size. 



In addition to the tape-worms mentioned in the general 

 articles on parasites, the dog suffers much from others, as 

 from the following round worms : Asearis Marginata, two 

 to four inches long; Spiroptera Sanguinolenta, one and 

 one-half to three inches long ; Strongylus Trigonocepha- 



