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SieboW have shown that the cysts in the flesh of the hog, causing 

 the condition known under the name of " measly pork," are pupa? 

 of the human tapeworm, and that they develop themselves into 

 the latter when taken into the human intestine ; and that the 

 human tapeworm, when eaten by a hog, produces in this animal 

 these cysts. In three instances, in which he had seen tapeworms 

 in Americans, these worms were identical with the Tcenia solium, 

 the tapeworm of the English and Germans, the same species 

 upon which the experiments of Kuchenmeister were made, — not 

 the Botriocephalus latus, the tapeworm of the French and Swiss, 

 which seems to have a different kind of development. He had 

 found a larva of a tapeworm, a so-called Scolen, with two large 

 red spots behind the head, in the intestine of the common 

 Alewife, (^Alosa Americana,) provided with four large suckers, 

 (acetabula,) but not having an articulated body, nor genital 

 organs. This larva was destined, as he supposed, to become a 

 perfect tapeworm only in the body of another vertebrated 

 animal by which the alewife might be swallowed, — perhaps in 

 a shark. He had found another larva of a tapeworm, the Tetra- 

 rliynchus 3Iorrhiice, Rud., {T. corollatus, Siebold,) in a cyst near 

 the heart of the common codfish. He had found the larva of 

 tapeworms, known under the name of Cysticercus, in the pelvic 

 region of the American hare, (Lepus Americanus,) and in the 

 liver of the rat, {Mus decumanus.) After a careful comparison, 

 he found them identical, one with the Cysticercus of the European 

 hare, and the other with that of the European rat; which be- 

 come, according to the experiments of the same Helminthologist, 

 Kuchenmeister, the first, the tapeworm of the dog, and the second 

 that of the cat; a fact likewise noticed by the American hunters. 



Dr. Weinland supposed that this Cysticercus of the American 

 hare came from the European dog ; the eggs of the tapeworm 

 having been swallowed by the hare, perhaps with vegetable 

 food. In another and new species of tapeworm, the Tcenia 

 punctata. Weinl., found in the gold-winged woodpecker, he had 

 observed the embryo just hatching. The shell of the egg of this 

 worm has two processes, each terminating in a large ball ; tlie 

 embryo is provided with six spines. Some years ago. Dr. Hein 

 and Dr. Meissner found pupa; of tapeworms in cysts in a land- 



