1862.] DR. T. 8. COBBOLD ON HUMAN ENTOZOA, 309 
C. potamocheri penicillati, Cobbold. 
C. cynocephali porcarit, Cobbold (MS.), 
Hydatigena orbicularis, Goeze. 
HI. globosa, Batsch. 
HH, oblonga, Batsch. 
Hydatis globosa, Lamarck. 
Hydra hydatula, Linneus. 
Hydatula solitaria, Viborg. 
Vesicaria orbicularis, Schrank. 
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 Tenia 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 7. 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 Kichenmeister, 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 7. marginata, or Tenia 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 T'apeworms (Proc. Zool. Soc. March 12, 
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 eysticerci are sometimes associated with Hchino- 
coccus in Iceland. 
26. TNIA ECHINOCOCCUS, Siebold. 
T'. echinococcus, Siebold, Leuckart. 
T. echinococcus scolicipariens, Kiichenmeister. 
T. granulosa, Gmelin, Prochaska. 
T. visceralis socialis granulosa, Goeze. 
T. nana, Van Beneden. 
Echinococcus hominis, Rudolphi, Bremser, Rendtorff, Chiaje, 
Miller, Owen, Gescheidt, Eschricht, Kihn, Gluge, Bright, Focke, 
Creplin, Hausmann, Doyere, Rokitansky, Siebold, Liidersen, Simon, 
