238 ENTOZOA. 



siten," p. 406j et seq.), he gives a condensed account of his experi- 

 ments with the fresh eggs of Tcenia mediocanellata. He fed two 

 calves with the proglottides of this worm. The first animal ex- 

 perimented on died from a violent attack of the measle-disease, 

 which resembles a kind of leprosy. This malady has since 

 been, not altogether inappropriately, characterized as " acute 

 cestode tuberculosis." On dissecting this calf, the muscles 

 were found filled with measles, or imperfectly developed scolices. 

 On the second occasion a smaller number of proglottides (in 

 all about fifty) were administered ; but the febrile symptoms 

 again appeared with such virulence that Leuckart thought this 

 animal would die also. Fortunately, after the lapse of a fort- 

 night from their commencement, some abatement of the disease 

 took place ; and this gradually continued until the animal was per- 

 fectly restored to health. Eight and forty days subsequent to the 

 feeding (i.e., reckoning from the earliest days of alimentation, for 

 the feedings were continued at intervals up to the eighteenth day) 

 Professor Leuckart extirpated the left cleido-mastoid muscle, and 

 whilst performing the operation had the satisfaction of seeing 

 the cysticercus-vesicles lodged within the muscles. They were 

 larger and more opalescent than those of the so-called Gysticercus 

 cellulosce, but, nevertheless, permitted the recognition of the young 

 worms through their semi-transparent capsules. The heads of the 

 contained cysticerci exhibited all the distinctive peculiarities pre- 

 sented by the head of the adult strobila {Tcenia mediocanellata) ; 

 and thus, taking the results of this experiment in connection with 

 previously ascertained facts, we are supplied with the most un- 

 equivocal evidence that man becomes infested by this second form 

 of tapeworm by eating imperfectly-cooked veal and beef. In all 

 probability, other animals are not liable to harbour the cysticercus 

 of the Tamia. mediocanellata, for Leuckart also tried to infect a 

 sheep (to which he administered about sixty proglottides), but on 

 examining the flesh after the lapse of eight weeks, he failed to detect 

 the presence of a single cysticercus vesicle. 



