CYSTICERCUS TENUICOLLIS. 187 



pass large, slender, white proglottides, 1 should be freed from their 

 Tanice in closed spaces, and the expelled tape-worm rendered 

 harmless by fire or spirits ; then that the shepherds and butchers 

 should be counselled and instructed to give their dogs no bladders 

 out of the mesentery, liver, and abdomen generally, and that, 

 where this disorder is endemic, particular care should be taken 

 in the use of drinking-water in free nature, and of those articles 

 of food which are consumed raw, and which, standing upon a 

 moist soil, had an opportunity of coming in contact with the 

 floating eggs of this Tcema. Local usages and customs in the 

 mode of life must furnish further data. See also the prophylaxis 

 of the Echinococci. The destruction of the brood of the cestoid 

 worms, when introduced into the stomach and just immigrating, 

 by the administration of anthelmintics, has never succeeded with 

 me. The object which I had iu view in these experiments is 

 perfectly clear. Had I succeeded in discovering a remedy which 

 would prevent the further development of the brood, then, in 

 countries where these parasites are endemic, this remedy would 

 have to be administered daily to the inhabitants. The same 

 thing would also be done with the domestic animals. It would 

 be interesting in this respect if agriculturists could tell us 

 whether those farms are permanently free from Coenuri, &c., in 

 which species of Pyrethrum occurred on the meadows. It is also 

 to be taken into consideration, as already indicated, that these 

 vesicular worms, as well as the Echinococci, have become rare in 

 the same proportion that the diet of the inhabitants has become 



1 As it lies beyond the purpose of this text-hook to give the specific distinctions more 

 exactly, I must confine myself to the description of the nature of the proglottides just 

 given. The white proglottides passing with the excrements of dogs can only helong to 

 T. Ccenurus, T. serrata, T. ex Cyst, tenuicolli, and T. solium ; the latter of which, how- 

 ever, I doubt. The form of the proglottides is sufficient for their distinction. Those of 

 T. Ccenurus are very narrow and slender ; those of T. serrata broad and somewhat 

 shorter; and those of T. ex C. tenuicolli are nearly of the size of the segments of 

 T. solium. If the proglottides be pressed between two glass plates, we see the further 

 distinctions above mentioned between T. solium and T. ex Cyst, tenuicolli. T. Ccenurus 

 has a very slender uterus, with unramified and not very long lateral branches, of which 

 about twenty may be counted on each side ; T. serrata vera has a uterus with broader 

 lateral branches, which are ramified, and form diverticula on all sides, and also very 

 commonly emit a large transverse branch to the porus genitalis. Besides the reasons 

 for the distinction of the species given here and formerly, it may also perhaps be pointed 

 out that, as I have shown in Moleschott's ' Untersuchungen,' Band i, p. 270, etseq., the 

 hooks are produced in all the species upon very different models. For more details as 

 to this difference, I must refer to the work quoted. 



