RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 1 29 



observed in one of the large military hospitals, in which hospital 

 gangrene had existed, during the late rebellion, he thought flies 

 should be carefully excluded from wounds. Recently he noticed 

 some flies greedily sipping the diffluent matter of some fungi of the 

 Phalhis ivipudicus. He caught several, and found that on holding 

 them by the wings they would exude two or three drops of liquid 

 from the proboscis, which, examined by the microscope, were found 

 to swarm with the spores of the fungus. The stomach was likewise 

 filled with the same liquid, swarming with spores, 



[December, 1871. No. 362. See Bibliography.] 



Notice of Some Worms. — Prof. I^eidy remarked that Prof. Hayden 

 reports the brook trout, Salmo fo7itinalis , of the headwaters of the 

 Yellowstone River, to be much infested with a species of tapeworm. 

 A number of specimens of the worm, collected by C. Carrington, 

 have been submitted to his examination, but, unfortunately, most of 

 them are so far decomposed as nearly to be reduced to the condition 

 of pulp. The worms are stated to have been taken from the abdom- 

 inal cavity, but not from the intestinal canal, and often were found 

 beneath the skin, extended among the muscles or inclosed in oval 

 sacs. Several cysts preserved entire contained worms in a better 

 condition for examination than the others, and from these the char- 

 acters of the parasite have been ascertained. It belongs to the old 

 genus Bothriocephalus, and to that section now named DibotJniutn. 

 Two species of this genus have long been known as infecting the 

 salmon and other members of the same genus of fishes in Europe, 

 but the parasite of the Yellowstone trout appears to be a different one. 



Two of the best preserved specimens measured five inches long by 

 a line wide at the broadest part. The head, about a fourth of a line 

 in diameter, is obcordate. The two suckers or bothria are thick and 

 discoidal, placed back to back, obcordate in outline, directed with 

 their broad and slighth' depressed surface towards the margins of the 

 body. The body is flat, thick, with rounded margins, and is nar- 

 rowly annulated or segmented. The annulations, due to muscular 

 bands, measure about ten to a line. Segments, independent of the 

 annulations, if existing, could not be distinguished, perhaps on ac- 

 count of the badly preserved condition of the specimens. No genital 

 apertures are visible at the sides nor at the margins. No internal 

 organs are visible, but the soft, solid interior tissue is filled with 

 round corpuscles resembling starch granules. These are. however, 



