A CESTODE PARASITE IN THE FLESH OF THE BUTTERFISH. 125 



Pomatomus saltatrix. Bluefish. 

 Beaufort, N. C: 



1901. — July 30, cysts in stomach wall. 



Aug. 28, numerous cysts in stomach wall. 



None found in the 9 other examinations of this fish made in 1901, nor in the 

 14 made in 1902. 



Poronotus triacanthus. Butterfish. 

 Woods Hole, Mass.: 



1899.— Aug. 26. 



1900.— Aug. 17. 



1904.— Aug. 8, 13, 17, 18, 24, 26. 



1905 and 1906.— See page 120 for details. 

 Nomans Land, Mass.: 



1904.— Aug. 30. 

 Montauk, Long Island: 



1904.— Sept. 20. 

 Barnegat, N. .1.: 



1904.— Oct. 12. 



Large numbers of cysts in flesh found on each occasion. 



Scdiodon terrse-novse. Sharp-nosed Shark. 

 Beaufort, N. C: 



1902. — July 11. numerous cysts in stomach wall between muscular coat and 

 submucosa. Many of the cysts were filled with degenerate tissue. 



Scomberomerus regalis. Cero. 



Beaufort, N. C, 1901. — Aug. 23, enormous numbers of cysts in stomach and 

 intestinal walls, for the most- part in the submucosa. Some of the cysts were 

 amber-colored, owing to the waxy degenerate tissue with which they were filled; 

 some contained blastocysts in which scoleces hail not yet developed tar enough to 

 be identifiable, while others contained scoleces which could be identified through 

 the transparent walls. Dimensions, life, under pressure, in millimeters: length of 

 cyst 1, shorter diameter, 0.8; length of larva, 0.32; bothria, length 0.16, breadth 0.12. 

 An amber-colored, thick-walled cyst measured 1 ..",-1 and 1.09 in the two principal 

 diameters: the blastocyst was 0.52 long and 0.28 broad, and the length of the 

 larva was 0.28. 



Trie/tin /us Upturns. Cutlass-fish. 



Woods Hole, Mass., 1903. — July 6, several clusters of small cysts from body 

 cavity, collected by Vinal N. Edwards. Some of the cysts were pedicelled; black 

 pigment associated with some. These cysts were evidently from the mesentery or 

 serous covering of the viscera. Dimensions in glvcerin, compressed, in millimeters: 

 cyst, 1.35 by 0.9; blastocyst, 0.75 by 0.63; larva, length 0.37; breadth of head, 0.22. 



Xiphias gJadius. Swordfish. 



Woods Hole, Mass., 1904. — July 15, a few small cysts from the serous coat of 

 the pyloric cceca, associated with small waxy cysts. Dimensions in millimeters: 

 blastocyst, length 1.6, breadth 1; larva, length 0.67; length of head and neck, 0.60; 

 breadth of head 0.21, of neck at base 0.16. 



Mustelus canis. Dog Shark. 



Woods Hole, Mass., 1905. — -July 31, two sharks examined. Cysts were found 

 in the stomach wall, many in one, few in the other. 



