1862.] DR.T. S. COBBOLD ON HUMAN KNTOZOA. 309 



C. jiotamocJmri pe7iicillati, Cobbold. 

 C, cynocephali porcarii, Cobbold (MS.). 

 Hyclatigena orbicularis, Goeze. 

 H. ylohosa, Batsch. 

 H. oblonga, Batsch. 

 Hydatis globosa, Lamarck. 

 Hydra hydatula, Limiseus. 

 Hydatula solitaria, Viborg. 

 Vesicaria orbicularis, Scbrank. 

 Vermis vesicularis eremita, Bloch. 



This species infests man only in the immature or cysticercal con- 

 dition, the full-grown tapeworm (strobila) being found in the dog 

 and wolf. It has often been confounded with the Tcenia serrata, 

 from which, however, it differs in the comparatively bulky size and 

 peculiar form of its hooks ; it is also a much larger worm, the pro- 

 glottides nearly equalling those of T. solium. It does not seem pos- 

 sible for the strobila to take up its abode in the human body, because 

 Dr. Moller's attempts to infest himself with it (by swallowing several 

 specimens of Cysticercus tenuicollis) were unsuccessful. In the 

 scolex condition this worm has an unusually wide distribution ; for, 

 in addition to its occasional presence in man, it has likewise been 

 found in various monkeys, in cattle and sheep, in many other rumi- 

 nants, in horses, in swine, and even in squirrels. The experiments 

 of Kuchenmeister, Leuckart, Luschka, and Roll have fully established 

 the fact that these various animals and ourselves become infested 

 with the so-called Cysticercus tenuicollis by accidentally swallowing 

 the eggs of T. marginata, or Tcenia ex cysticerco tenuicolli (Kiichen- 

 meister), which is the same thing. The cysticerci occasionally 

 attain an enormous size, as was the case with those I obtained from 

 the Wart and Red River Hogs which died at the Zoological Society's 

 Gardens in 1859 and 1860, and which I at first supposed to be refer- 

 able to two hitherto unknown Tapeworms (Proc. Zool. Soc. March 1 2, 

 1861). Leuckart, however, to whom I forwarded one of the speci- 

 mens, has corrected me in this matter. In one the caudal vesicle 

 ■was pyriform and about .5 inches in length ; in another it had the 

 size and form of a cricket-ball. Eschricht and Schleissner have 

 shown that these cysticerci are sometimes associated with Echino- 

 coccus in Iceland. 



26. T-^NiA ECHiNococcus, Sicbold. 



T. echijiococcus, Siebold, Leuckart. 



T. echinococcus scolicipariens, Kiichenraeister. 



T. gra^iulosa, Gmelin, Prochaska. 



T. visceralis socialis granulosa, Goeze. 



T. nana. Van Beneden. 



Echinococcus hominis, Rudolphi, Bremser, Rendtorff, Chiaje, 

 Miiller, Owen, Gescheidt, Eschricht, Kiihn, Gluge, Bright, Focke, 

 Creplin, Hausmann, Doyere, Rokitansky, Siebold, Liidersen, Simon, 



