A revision of the adult cestodes of cattle, sheep and allied animals ... / by C.W. Stiles ... and Albert Hassall.

  • Charles Wardell Stiles
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: A revision of the adult cestodes of cattle, sheep and allied animals ... / by C.W. Stiles ... and Albert Hassall. Source: Wellcome Collection.

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    T. Giardi, T. centripunctata, and T. globipunctata; to Prof. Moniez, of the Medical Faculty of Lille, France, I am indebted for the original material of the parasites described by him under the names: T. Giardi, T. Ben- edeni, T. Neumanni, and T. nullieollis, as well as for specimens of other French tapeworms: to Prof. Pailliet, of the Veterinary School of Alfort, France, 1 am indebted for specimens of M. pianissimo,-, to Prof. It. Blanchard, of Paris, France, 1 am indebted for specimens of Tcenia marmot a; which I wished to compare with the above-mentioned forms found in cattle and sheep; to Dr. von Marenzeller, of Vienna, I am indebted for a specimen of M. Benedeni; to Prof. Perroncito, of Turin, Italy, I am indebted for three strobihe of his original material from which he described Tcenia alba; to Dr. G. M. Giles, of Sanawar, Punjab, India, I am indebted for specimens of Tcenia globipunctata. Besides the above-mentioned, specimens I have had at my disposal the entire Bureau collection of tapeworms of cattle and slice]), over 800 in number, collected by Dr. Curtice, Dr. Hassall, and myself; also a number of specimens from Dr. Hassall’s private collection, made in England, and from my own collection of parasites, made in France, Germany, Austria, and America. I wish to acknowledge, also, the services of my assistant, Dr. Hassall, who has made about 2,000 microscopic slides for my use. For that portion of this bulletin which deals with new species and for the bibliography at the end of this paper, both Dr. Hassall and myself are to be considered responsible, while I alone am responsible for the statements made in regard to the species already known. According to the rules passed by the International Zoological Congress, Paris, 1889, the law of priority must be strictly adhered to in determin- ing the generic and specific names of animals. Most zoologists have adopted this rule, although it occasionally causes inconvenience for the time being. In a former paper I objected to applying the rule in all cases, stating, as a particular case, that we should speak of Pentastomum proboscideum rather than revert to the specific name crotali. At pres- ent, however, I wish to withdraw from that position, for I am thor- oughly convinced that we can never obtain a fixed nomenclature until the “law of priority” and the rule “Once a synonym always a syno- nym” are strictly enforced according to the rules laid down by the International Congress. I am hence in favor of speaking of Linguatula rather than Pentastomum, and if the genus Linguatula is divided we are obliged to accept the genera, Linguatula and Porocephalus—Poro- cephalus crotali, instead of Pentastonum proboscideum.* *We should in that case speak of Porocephalus constrictus, Por. annulosus, Por. polyzonns, Por. suhuliferus, Por. moo ill for mis, Por. meyastomus, Por. oxycephalus, etc. It is not at all improbable that Porocephalus armillalus {Linguainla armillala Wyman, 1845) will prove to he identical with Porocephalus polyzonns, in which case Wyman's specific name must he accepted. I hope later to compare the type specimens of some of these forms in order to straighten out the synonymy, which seems at pres- ent to be very uncertain.