T^NIA AOANTHOTEIAS. 243 



showed a selected series, cleared up my doubts as to one or two frag- 

 ments. Moreover, Dr. Aitken finds this species more abundant 

 amongst the soldiers stationed at Fort Pitt, than the so-called 

 common tapeworm. Finally, it has become conspicuously evident 

 that the hookless tapeworm is as abundant in this country as the 

 Tcenia solium. One may even go so far as to state that, admitting 

 occasional exceptions, the hooked worm infests the poor, and 

 the hookless worm the rich. This circumstance accords with the 

 fact that the lower classes subsist chiefly upon pork, whilst the 

 wealthier prefer mutton, veal, and roast beef. 



12. T^NIA ACANTHOTRIAS. 



T. (Gysticerc'its) acanthotrias, Weinland ; Leuckart ; etc. 



Acanthotrias, Weinland. 



The specific distinctness of this new tapeworm is founded on 

 the examination of several cysticerci, " preserved in the Collection 

 of the Medical Improvement Society, Boston, and in the Anato- 

 mical Museum, Cambridge, U. S." From twelve to fifteen of these 

 cysts were found by Dr. Jefiries Wyman (1845) in the muscles of 

 a woman about fifty years of age — a dissecting-room subject at 

 Richmond, Virginia. Dr. Weinland, of Frankfort, during his stay 

 in America (1858), on carefully examining one of these cysticerci, 

 made the very curious, and, in some respects, unique discovery 

 that its rostellum was furnished with three rows of hooks, fourteen 

 in each, the hooks themselves presenting the usual characters. 

 Dr. Weinland proposes to elevate this species as the type of a new 

 genus [Acanthotrias) ; but unless the (yet to be discovered) strobila 

 displays other characters differing from those of ordinary tape- 

 worms, it is, perhaps, better to retain it among the Tasnias. 



13. TjiNIA rLAVOPUNCTA. 



T. flavopuncta, Weinland ; Moquin-Tandon ; Leuckart. 

 ? T. flavomaculata, Molin. 

 Hymenolopis flavopuncta, Weinland. 



