RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 199 



with a pair of trilateral oval chitinous disks, each with three spira- 

 cles : intermediate segments with numerous minute recurved hook- 

 lets, disposed in incompletely separated bands at the fore and back 

 part of the segments. 



The .sac containing the larvae is about three-fourths of an inch 

 long and half an inch broad, with a short tubular prolongation open 

 at the extremity. It was uncertain whether the sac formed part of 

 the intestine. 



The dish of stewed terrapins was suspected to have been a mixture 

 of the diamond-back, Eniys palustris, and the red-bellied terrapin, 

 E. rugosa. This is not the only instance of the occurrence of bots 

 in turtles, as Prof. A. S. Packard notes the case of larvse being 

 found in the skin of the neck of the box-turtle, Listudo Carolina. — 

 (American Naturalist, 1882.J • 



[January, 1887 No. 550. See Bibliography.] 

 TAPEWORMS IN BIRDS.^ 



Birds are as much infested with intestinal worms as other classes 

 of animals, and none appear to be exempt, no matter what may be 

 the nature of their food, though aquatic birds appear to harbor a 

 greater number of species, as exemplified b}- ducks and geese. 



Among the parasites, tapeworms, mostly of the genus Tcenia, 

 are common, though less frequent than the thread worms. The 

 domestic fowl in Europe had been reported to harbor half a dozen 

 different species of Tcvnia, though I have as yet ob.served but one 

 with us, and this but rarely. No species, I believe, has been noticed 

 in our turkey, nor the guinea fowl and pea fowl. 



Fig. I. — Anterior extremity of Tcniia niicrops. 30 diameters. 



Dr. J. Van A. Carter, of Fort Bridger. Wyoming, directed my 

 attention to the .sage fowl, Centrocercus itrop/iasia)iHs, as being much 

 infested wdth tapeworms. They often occur together in large 

 numbers, sometimes so as to distend the small intestine. The young 

 birds especially are affected ; and the old birds appear comparatively 

 exempt. Perhaps this may be due to the individuals much infested 



••Journal of Comparative Medicine and Surgery, Vol. VIII. 



