of the above birds measured 0.110 to 0.120 mm. in length 

 and 0.075 to 0.080 mm. transversely, and those from the 

 parasites of the second bird 0.105 to 0.120 mm. in length 

 and 0.060 to 0.080 mm. transversely. 



II. Cestodes. 



(a) Larval or Bladderworm Stage. 



5. Cysticercus fasciolaris (bladderworm of Ttrnia crassi- 

 colis, Rudolphi, of cat) is recorded four times: once in the 

 liver of a muskrat, Fiber zibcthicus (L.), killed at Kennett 

 Square, Pennsylvania, and presented by Dr. I. H. Alexander 

 (Path. Mus., 169); twice (Path. Hist., 1652) in the livers of 

 white experiment rats in the laboratory and in Wistar Institute; 

 and once in the liver of a white mouse, presented by Mr. 

 Howard Crawley. In all cases these bladderworms were pres- 

 ent in numbers, the liver of the muskrat containing several 

 hundreds and being enormously enlarged in consequence. 



6. Cysticercus tenuicollis (bladderworm of Tcenia mar- 

 ginala, Batsch, of dog) was encountered twice (Path. 

 Mus., 44, 45) in the subperitoneal tissue of the domestic 

 sheep, Ovis aries; two examples from the same host 

 having been obtained in Iowa by Dr. Repp; and a third, a 

 single occurrence, from the dressed carcass of a sheep in 

 one of the Philadelphia markets, by one of the veterinary 

 medical students. Recently Professor Joseph McFarland, 

 of the Medico-Chirurgical College of this city, submitted 

 to the writer a fourth example which he had obtained from 

 the subperitoneal tissue of a goat, Capra hircus. 



7. Cysticercus cellulosce (bladderworm of Tcenia solium, 

 Rudolphi, of man) was submitted for identification (Path. 

 Mus., 29) in the flesh of a domestic hog, Sus scrofa, by 

 Dr. J. W. Nixon, of Gonzales, Texas. Once before, in 

 Texas, pork has been found infested by this larva by the 

 writer. It may be added, however, that, out of some dozens 



