PACHYDEEMATA 



405 



each pound of the flesh must have contained upwards of 600 

 Cysticerci. I was informed by the donor, Dr Prior, that in 

 spite of the disgusting state of the meat much of it had been 

 eaten by the well-to-do family who purchased the ham. Cysti- 

 cerci occasionally occupy the brain of the pig in considerable 

 numbers. Florman recorded a case of this kind where their 

 presence gave rise to vertigo in all respects resembling the gid 

 ordinarily produced by Coenurus in the sheep. As regards the 

 larger cestode larvge, Gysticercus tenuicollis and Echinococcus 

 veterinorum are of frequent occurrence. One not unfrequently 

 encounters the former in the mesentery, whilst the liver of the 

 hog is sometimes so crowded with hydatids that scarcely any of 

 the glandular substance of the organ remains visible. It is 

 surprising how little the infested bearers appear to be incon- 

 venienced in such cases. In the winter of 1859, and in the 

 autumn of 1860, I found large cystic entozoa in an African Wart- 

 hog and in a Red River hog. 

 These animals had died at the 

 London Zoological Society' s 

 Menagerie; and as the worms 

 appeared to me at the time to 

 be quite distinct from the ordi- 

 nary slender-necked hydatid, 

 they were named, respectively, 

 Cysticercus phacoch&ri oethiopici 

 and G. potamoch&ri penicillati. 

 The solitary example from the 

 wart-hog was found in a cyst 

 near the colon ; whilst of the five 

 large bladder-worms obtained 



from the Red River hog, one in- "i 



fested the liver and the other FlG . 66 ._ He ad and neck of oy,ticm, from the 

 four were lodged in the folds ^ d al Kiver hog " Ma s nified 60 diameters - Ori - 

 of the mesentery. The caudal 



vesicle of the worm from the wart-hog measured 3|" in 

 diameter, the vesicle of the other bladder-worm being much 

 longer. A reference to the original figures will show that 

 these forms are distinct. Swine are largely infested by nema- 

 todes. The best-known form is Ascaris lumbricoides, which 

 Dujardin regarded as distinct (A. suilla). The hitherto dis- 

 puted identity of this worm with the human lumbricoid being 

 no longer questionable, the importance of the entozoon in rela- 



