RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. lOI 



on the ventral aspect of the extremity. Caudal extremity of the 

 mail spiral ; tail long, conical acute ; generative aperture a consid- 

 erable distance from the end of the tail. lyength of female 3 inches, 

 breadth i-6th of a line; length of male i^-j inches, breadth one- 

 tenth of a line. 



Seven specimens were obtained from the small intestine of the 

 cat, Fclis cahis. 



154. ? Trichosomiim Picorum. Body cylindroid, equally narrowed 

 and acute at the two extremities. Mouth and anus terminal. 

 Length of female 7 lines, breadth one-fifth of a line. 



A single specimen was obtained by Mr. Schafhirt from the intes- 

 tine of Pi CHS col arts. 



155. Aga)iionei)ia Capxularia? Diesing. Body slender, most nar- 

 rowed anteriorly. Mouth small, circular, surrounded by an undi- 

 vided lip. Tail short, obtusely conical, minutely mucronate. 

 Length 5 to 10 lines, breadth from i-8th to i-4th of a line. 



Found free in the intestine of Ceiitropristes nigricans, Clnpea don- 

 ga ta, and Alosa sapidissin/a ; also free in the intestine and pancreatic 

 coeca of Morrhua aincricana, and larger specimens, i inch in length 

 and I -3d of a line in breadth, coiled up within sacs of the perito- 

 neum in the same fish. 



156. Agamoncnia Papilligcnim f Diesing. Body cylindrical, most 

 narrowed anteriorly, posteriorly obtu.sely conical. Mouth sur- 

 rounded by four papillae ; anus terminal. Length to 4^4 inches, 

 breadth two-fifths of a line. 



One specimen was obtained from the abdominal cavity of Esox. 



157. Filaria Mcdinensis, Gmelin. 



Filaria hominis oris f \i€\^y. Pr. A. N. S., v, 117. 



A specimen is preserved in the collection of the Academy, and 

 was recently brought from western Africa by Dr. J. L. Burtt, U. S. N. , 

 who obtained it from the leg of a white soldier. 



158. Filaria Papulosa, Rud. 

 Intestine of the ox, Bos tanrus. 



159. Filaria Ininiitis, Leidy. 



Filaria canis cordis, Leidy. Pr. A. N. S., v, 118. Body cylin- 

 drical, obtusely rounded at the extremities. Mouth small, round, 

 unarmed. Caudal extremity of male spiral, with a row of five tuber- 

 cles, and a narrow ala upon each side. Penis protruding a short 

 distance above the anus. Length of female to 10 inches, breadth to 

 ^ a line : length of male to 5 inches, breadth i-4th of a line. 



Mr. Joseph Jones recently presented to me two specimens of the 

 heart of the dog, in the right ventricle of one of which there were 



