A, Cysticercus bovis in beef; nat.
B, invaginated head of a Cysticercus before the formation of the suckers; X 25.
C, invaginated head of Cysticercus cellulosae, showing the bent neck and receptacle r; X 30.
E, F, result of digestion of cysticercus in the stomach of the dog.
The evolution of the cysticercoid, cysticercus and other forms of larvae is a varied adaptive phenomenon.
Cysticercus cellulosae may be comparatively innocuous in a muscle or subcutaneous tissue, but most hurtful in the eye or brain.
Thus Echinococci contains a leucomaine which sets up an urticaria; Cysticercus tenuicollis occasions anaemia and death if injecte-1 into rabbits; and the cystic fluid of the common Coenurus serialis is said to be used by Kirghizes to poison wolves.
Measly beef (that infected with the Cysticercus bovis) is easily recognized.
In North Germany the mature tapeworm was found on post-mortem examination once in every 200 bodies examined, while its embryo, the Cysticercus cellulosae, was found in in every 76 bodies.
At m the ideal mode of origin is shown in order to illustrate the fact that the daughter cyst is comparable to the fore-body of a cysticercus.