312 DR. T. S. COBBOLD ON HUMAN ENTOZOA. [NoV. 25, 



27. TiENiA NANA, Siebolcl. 



T. nana, Siebold and Bilharz, Kilchenmeister, Leidy, Moquin- 

 Tandon, Leuckart. 



T. cegyptiaca, Billiarz. 

 Diplacanthus nanus, Weinland. 



Kuchenmeister, in his enthusiasm, was led to indulge the hope 

 that this minute Tapeworm would turn out to be his imaginary 

 l^cenia echinococcus alt7-icipariens ; and I find that Van Beneden 

 has fallen into the error of describing the Tcenia echinococcus of 

 Siebold under the title of T. nana. This is unfortunate. "Weinland, 

 on the other hand, has suggested the formation of a new genus for 

 the reception of this worm ; but the so-called "bifid" character of 

 the hooks (as described by Bilharz) is a misnomer, the "doubled" 

 appearance being simply due to the close approximation of the claw 

 and the anterior root-process (Leuckart). The hooks are essentially 

 the same as those of other Tcenice, only they are very minute and 

 slightly peculiar in form. The full-grown strobila attains a length 

 of 8 or 10 lines, and carries from 150 to 170 joints. The cysticercal 

 condition is at present unknown ; but Leuckart thinks it may be 

 found m some kind of insect. 



28. T^NiA ELLiPTicA, Batsch. 



T. elliptica, Batsch, Rudolphi, Creplin, Gurit, Dujardin, Diesing, 

 Leuckart, Cobbold. 



T. canina, Pallas (also probably of Linnaeus, "Werner, Eschricht, 

 Van Beneden). 



T. canina felis, "Werner. 



IT. cucumerina, Bloch, Rudolphi, Creplin, Gurlt, Dujardin, Die- 

 sing, Leuckart, Cobbold. 



IT. cateniformis, Goeze, Gmelin, Rudolphi. 



T. cateniformis felis, Gmelin. 



T. cuniceps, Rudolphi. 



?r. osculis marginalibus oppositis, Linnaeus. 



1 Alyselminthus ellipticus, Zeder. 



A. cuniceps, Zeder. 



IHalysis elliptica, Zeder. 



From the statement long ago made by Eschricht, that he had 

 received a Tcenia canina, passed by a negro slave at St. Thomas, 

 Antilles, and more especially from the clear evidences recently 

 adduced by Leuckart ('Die mensch. Parasiten,' p. 402), there can- 

 not be a shadow of doubt that either the Tcenia elliptica of the cat 

 or the T. cuciimei-ina of the dog may be reckoned amongst the 

 cestodes liable to infest man. Those who, with Leuckart, regard 

 the cat's tapeworm as a distinct species from the Tcenia cucumerina 

 of the dog will probably (on reading the evidence put forth by 

 Leuckart) come to the conclusion that both these worms infest the 

 human body. I have examined these reputedly distinct forms, and 

 I find that there are differences of size and outline affecting the 

 joints, but I cannot yet follow Leuckart and pronounce them to be 



