THE CYSTIC ENTOZOA. 503 



iv. SPHAIRIDION (MIHI.) 



S. Animal enclosed within a cyst which is composed of two 

 membranes. Sac single, containing the pedicle or reproductive 

 body in its centre, and presenting a number of concentric 

 coloured rings. Hob. Peritoneum of Crested Balearic Crane. 



V. C^NURUS RUDOLPHI. 



Sac double, armed with numerous clusters of toothed 

 pedicles. Epithelial cells in the sac. Germinal cells in the 

 pedicles. Buried. 



6. Ccenurus liepaticus (Mih'i). 



Sac botryoidal, opaque and thick ; pedicles internal, small, suckers 

 obsolete ; teeth barbless, small, irregularly bent, and forming one irregular 

 series. Gregarious. Infests the liver of man. 



7. 0. cerebralis (Rudolphfy. 



Sac globular, transparent, thin, pedicles with four or five acetabula. 

 Teeth thirteen, about three times as long as the breadth of the disc from 

 which they arise. Infests the brain of sheep and other ruminants. 



VI. CYSTICERCUS. 



Animal enclosed within a cyst provided with a single pedicle. 



1. Cyst formed from the infested animal. 



8. 0. neglectus (Miln). 



Cyst formed from omentum of infested animal. Pedicle about three times 

 the length of sac, head rounded, teeth twenty-one in number, very long, 

 slender, and bent at the extremity, barbed on bent edge. Hob. unknown. 



2. Cyst formed by parasite, as well as from textures of 

 nfested being. 



9. 0. rattus (Mihi). 



Cyst small, globular, and transparent pedicle, not very long, teeth short, 

 sickle-shaped, being curved throughout their whole length. 



VII. ECHINOCOCCUS. 



H. D. S. G. 



