1856.] 55 



154. ?Trichosomum 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 S2>ecimen was obtained by Mr. Schaf hirt from the intestine of Ficus 

 colaris. 



155. Agamonema capsularia? Diesing. Body slender, most narrowed an- 

 teriorly. Mouth small, circular, surrounded by an undivided lip. Tail short, 

 obtusely conical, minutely mucronate. Length 5 to 10 lines, breadth from \ to 

 \ of a line. 



Found free in the intestine of Centropristes nigricans, Clupea elongata , and Alosa 

 sapidksima. Also free in the intestine and pancreatic coeca of Morrhua ameri- 

 cana ; and larger specimens : 1 inch in length and ^ of a line in breadth, coiled 

 up within sacs of the peritoneum in the same fish. 



156. Agamonema papilligerum? Diesing. Body cylindrical, most narrowed 

 anteriorly, posteriorly obtusely conical. Mouth surrounded by four papillaj ; 

 anus terminal. Length to 4i inches, breadth two-fifths of a line. 



One specimen was obtained from the abdominal cavity of -Eaoz 



157. FiLARiA MEDiNENSis Gmelin. 



Filaria hominis oris? Leidy, 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 papillosa Rud. 

 Intestine of the ox, Bos taurus. 



159. Filaria immitis Leidy. 



Filaria Canis cordis Leidy, Pr. A. N. S., v, 118. Body cylindrical, obtusely 

 rounded at the extremities. Mouth small, round, unarmed. Caudal extremity 

 of male spiral, with a row of five tubercles and a narrow ala upon each side. 

 Penis protruding a short distance above the anus. Length of female to 10 inches, 

 breadth to 5 a line ; length of male to 5 inches, breadth ^ 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 five of the Filarice ]\xsi de- 

 scribed. In the other specimen, the right auricle and ventricle, and the pulmo- 

 nary artery in its ramifications through the lungs are literally stuffed with 

 Filarial. A portion of the blood of this dog, given to me by Mr. Jones, contains 

 a great number of the young of the Filaria. 



In relation to the symptoms which accompanied the presence of these worms 

 in the heart while the dogs were living, Mr. Jones has furnished the following 

 notes : The heart containing the five worms, was taken from a male pointer dog, 

 whose appetite was voracious and insatiable, and notwithstanding he was 

 abundantly supplied with food, he remained in a very lean condition. The heart 

 and lungs containing great numbers of worms was from a cur dog, who was 

 always so thin as to resemble a skeleton ; and it was impossible to benefit his 

 condition with the most liberal supply of food. Both dogs were of an exceeding- 

 ly restless disposition. They did not die in consequence of the presence of the 

 Filarice, but were killed in the course of some physiological experiments. 



160. ? Filaria dubia Leidy. Bodj^ cylindroid, narrowed towards the extremi- 

 ties, rolled in a transverse spiral. Head continuous with the body, naked. Mouth 

 minutely papillated. Tail acute. Length 9 lines, breadth ^ of a line. 



Nine specimens were contained within two globular sacs of the gastric mucous 

 membrane of the Albatross, Diomedea exulans, the preparation having been ob- 

 tained in the South Atlantic, by Dr. W. S. W. Ruschenberger, U. S. N. The 

 sacs also contained each a brown globular body about 3J lines in diameter, 

 divided by lines into quarters, intersected by transverse corrugations. At one 

 pole of these enigmatic bodies was an elliptical aperture, and at the opposite 

 pole a small conical tail-like appendage. C>ne of the bodies being cut open, ex- 



