148 PROCEEDINGS OF THE ACADEMY OF [March, 



these animals suggests lines of transmission from one host to 

 another. 



Microscopically, all three worms were found to be females. Two 

 were perfect. Head is missing from the third, suggesting that it was 

 firmly attached to the mucosa. The worms conform in every re- 

 spect to the accepted generic descriptions of Tricocephalus. The two 

 perfect specimens measure each 27 mm. in length. The posterior 

 portion is 8.5 mm. long, the narrow, more attenuated, anterior 

 portion, including the head, 18.5 mm. This gives a close proportion 

 of one to two. Measurements were made of ova which lay in the 

 oviduct close to the vulvar opening. They are- 23-25 mc. broad 

 and 52-55 mc. long, including the button. 



It is unfortunate that no males were included in the material, 

 since it is by these alone that the species may be surely determined; 

 sexual apparatus (especially the sheath of the spicule) furnishing 

 the differentiating characteristics. 



As far as the material goes, this might easily be a specimen of 

 Trichocephalus dispar. The ova are almost identical, measuring 

 for the largest specimens 25 by 55 mc. as against 23 by 53 for T. 

 dispar. It is true that the specimens are smaller, measuring 27 liim. 

 in length as against 35 mm. for T. dispar, but this is not an uncommon 

 variation for identical species in different hosts. (Witness Ascaris 

 mystax in cats and lions.) Neither does the size of the eggs conform 

 to that given for other species of Trichocephalus: crenatus, 52 by 56, 

 from pig; affinis, ? by 65, from horse; felis, 36 by 72, from cat; 

 unguiculatus, 31 by 52, from rabbit; depressicollis, 31 by 80, from 

 dog and fox; senrdus, 39 by 56, from cat. 

 Paragonimus westermanii (Kerb.). 



This parasite has been found- in two wild-cats, Felis rufus. They 

 lie in cystic dilatations of the bronchi, generally in pairs. An 

 inflammatory zone is present around each focus. There are not 

 more than half a dozen in each cat. The finding has been made the 

 subject of a paper ^ presented before the Philadelphia Pathological 

 Society by Fox, Smith, Rivas, and Weidman, in which it is pointed 

 out that this worm has occurred in San Francisco, St. Louis, Cin- 

 cinnati, in the Appalachians, and in the Carolinas, whence these cats 

 came. It is the belief of these writers that the parasite will be 

 found oftener in man if it is carefully looked for, and is likely to 

 become more frequent in the United States with the development 

 of our East Indian possessions, where its effects are endemic. 



3 To be published in a medical journal. 



