A CESTODE PARASITE IN THE FLESH OF THE BUTTERFISH. 128 



Bairdiella chrysura. Yellow-tail. 

 Beaufort, N.C.: 



1901. — Aug. 12, small cysts on viscera; scoleces immature and not certainlj' 

 identifiable. 

 Aug. 15, scoleces in cysts on viscera. 

 1902. — July 17, cysts on viscera. 



July 19, cysts on viscera and in mesentery'. 

 Aug. 8, cysts on viscera and in mesentery few. 

 This host was examined on 4 other occasions in 1901 and on 12 other occasions 

 in 1902 when these para.sites were not found. 



Carcluirhinus ohscurus (?). Duskv Shark. 

 Beaufort, N. C. : 



1902. — July 11, several noted in ellipsoidal cysts in stomach wall between 

 submucous and muscular coat. 

 July 26, immense numbers encysted in stomach wall. Dimensions in 

 millimeters, specimen slightly compres.sed: length of blastocyst, 1.5; 

 breadth, 0.9; larva, length, 6.41. 

 Woods Hole, Mass. : 



1905. — Aug. 11, one shark examined. Numerous cysts were found between 

 the mucous and muscular layers of the stomach wall. 



Corijphsena Mppurus. Dolphin. 

 Beaufort, N C: 



1902. — Aug. 1, very numerous, encysted in submucous coat of stomach. 



Cynoscion nebulosus. Speckled Trout. 

 Beaufort, N. C: 



1901. — July 15, cysts very numerous between muscular coat and submucosa 

 of stomach. 

 July 22, large numbers of cysts in stomach wall. 

 Aug. 28, numerous cysts in stomach wall. 

 This species examined on 4 other occasions in 1901 and once in 1902, when these 

 cysts were not found. 



Cynoscion regalis. Gray Trout, Squeteague, Weakfish. 



Beaufort, N. C: 



1902. — Aug. 18, few cysts in stomach wall. 



Aug. 19, few cysts in wall of alimentarA' tract. 

 Cysts not found in the three other examinations of this fish in 1902. 

 Woods Hole, Mass.; 



1903. — Aug. 20, encysted in stomach wall. 

 1904. — July 8, small cysts on viscera. 



Aug. 6, two small cysts from viscera. One of these cysts, measuring 

 1.8 and 1.12 millimeters in the two principal diameters, contained three 

 blastocysts (fig. 6). The blastocysts were actively contracting and 

 extending themselves, and the bothria of the scoleces were also active. 

 The walls of the cyst were tran.sparent. 

 1905. — July 8, one. One cyst in stomach wall. 



July 14, one. Few cysts in stomach wall. 

 July 17, six. Few cysts in stomach wall. 

 July 19, ten. Cysts on mesentery. 

 Associated with cysts of Tefrarhynchus bisuJeatus. 



