RECTIFICATION OF NOMENCLATURE. 421 



designation for the armed species, which has been generally known 

 by the latter name in modern zoology. One might perhaps call it 

 Tcenia pellucida, following Goze's diagnosis. But by this change of 

 name the confusion in the nomenclature of the tape- worms, which is 

 already great enough, would only be increased. I feel myself, there- 

 fore, constrained along with Kuchenmeister, in the interests of 

 scientific intelligibility, to uphold the name of Tcenia solium for the 

 armed form. 



It is thus the unarmed form which has to receive another name. 

 Kuchenmeister has, as we have seen, chosen for it the designation 

 Tcenia mediocanellata, which has since been frequently adopted. -He 

 confesses, however, himself that the choice is "not a very happy 

 one," since it suggests the erroneous opinion which he at first upheld, 

 that the uterine stems of the joints were united together into a com- 

 mon longitudinal canal. It must also be noted that Kuchenmeister's 

 T. mediocanellata had previously received, as we have seen, many 

 other names. Thus, besides such names as Tcenia lata ( T. inermis, 

 Brera) and Botliriocephalm tropicus, which we may leave out of 

 account since they rest on false presuppositions, it has been called 

 T. grandis saginata by Goze, and T. dentata by Nicolai. It is surely 

 not only justifiable, but really demanded, by the rules of zoological 

 nomenclature, that the thoroughly unsuitable designation "medio- 

 canellata" should be replaced by Goze's very appropriate name 

 " saginata" as I proposed some years ago in my reports on the pro- 

 gress of the natural history of the lower animals. 1 Since this name 

 has, in the meantime, been generally accepted e.g., in Glaus' 

 " Zoology " and Moniez's " Monograph," and has even obtained cur- 

 rency in medical writings through Lewin and Heller, and since 

 Kiichenmeister has himself declared that he was prepared to accept 

 any name more suitable than his own, I have no scruple in using the 

 name Tcenia saginata. 



Though Kuchenmeister's investigations on the Tcenice have now 

 been rewarded by the appreciation they deserve, it ought to be men- 

 tioned that his newly described and, as it appeared, newly discovered 

 " T. mediocanellata " was not at first recognised on all hands. A few 

 investigators declared themselves distinctly in favour of ranking it as 

 a distinct species, and sought to corroborate their opinion by investi- 

 gation and experiment. Of these were such men as the elder van 

 Beneden and A. Schmidt in Frankfort. 2 Others, on the contrary, 

 remained neutral, or cast doubts upon the constant association of the 

 characters upon which Kuchenmeister relied, or would at most regard 



1 Archivf. Naturgesch., Jahrg. xxxiii., Bd. ii., p. 284, 1867. 

 - See the first German edition of this work, Bd. i., p. 238. 



