312 DR. T. S. COBBOLD ON HUMAN ENTOZOA.  [Nov. 23, 
27. T&£N1A4 NANA, Siebold. 
T. nana, Siebold and Bilharz, Kiichenmeister, Leidy, Moquin- 
Tandon, Leuckart. 
T. egyptiaca, Bilharz. 
Diplacanthus nanus, Weinland. 
Kiichenmeister, in his enthusiasm, was led to indulge the hope 
that this minute Tapeworm would turn out to be his imaginary 
Tenia echinococcus altricipariens; and I find that Van Beneden 
has fallen into the error of describing the Tenia echinococcus of 
Siebold under the title of 7. 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 Tenia, 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 ia some kind of insect. 
28. THNIA ELLIPTICA, Batsch. 
T. elliptica, Batsch, Rudolphi, Creplin, Gurlt, Dujardin, Diesing, 
Leuckart, Cobbold. 
T. canina, Pallas (also probably of Linnzeus, Werner, Eschricht, 
Van Beneden). 
T. canina felis, Werner. 
27. cucumerina, Bloch, Rudolphi, Creplin, Gurlt, Dujardin, Die- 
sing, Leuckart, Cobbold. 
?T-cateniformis, Goeze, Gmelin, Rudolphi. 
T. cateniformis felis, Gmelin. 
T. cuniceps, Rudolphi. 
2T. osculis marginalibus oppositis, Linnzus. 
? Alyselminthus ellipticus, Zeder. 
A. cuniceps, Zeder. 
? Halysis elliptica, Zeder. 
From the statement long ago made by Eschricht, that he had 
received a Tenia 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 Tenia elliptica of the cat 
or the 7. cucumerina 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 Tenia 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 
