ART. 21. PARASITES OF SHAEKS AND SKATES LINTON. 79 



and probably represent different species. A revision of the species 

 is deferred until more material from southern fishes is available. 

 Those here recorded appear to belong to the species represented by 

 the forms originally described from the blue fish. 



Caranx chrysos. 



1910, September 13: 1 cyst from viscera. Dimensions of larva 

 in glycerin: Length 7.42; length of scolex 4.(52; bothrium, length 

 0.56, breadth 0.56 ; diameter behind bothria 0.49, at bulbs 0.77 ; bulbs, 

 length 0.90, diameter 0.21, 1 fish examined. 



C eratacanthus schoepfli. 



1920, July 28 : Large, and for the most part, elongated cysts from 

 viscera; maximmn length 65, diameter 2 to 6 imn., and length 40, 

 diameter 5 mm., 1 fish examined. 



Gynoscion regalis. 



1904, August 9: 1 larva in thin cyst, no plerocercus, on viscera, 6 

 fish examined. August 13 : 1 cyst on viscera, 1 fish examined. 



1905, July 17 : 1 cyst from serous coat of viscera, 6 fish examined. 

 July 18 : 1 cyst on viscera, 12 fish examined. 



19Q8, July 28: 1 scolex from intestine, probably recently intro- 

 duced with food, 2 fish examined. 



Pomatomus saltatrix. 



1904, July 22 : 1 cyst on viscera, 6 fish examined. 



1910, July 1 : A large cyst, 24 by 8 mm., embedded in the pyloric 

 caeca, with plerocercus, but no scolex yet developed ; resembled cysts 

 of this species, 1 fish examined. July 5 : 1 cyst on intestine, 1 fish 

 examined. August 22: 2 long pyriform cysts on intestine, 2 fish 

 examined. 



1911, Julv 17 : Cysts with immature plerocerci, 10 fish examined. 

 (U.S.N.M., Helm. Coll. 7708.) 



Remora remora. 



1912, November 7: 1 cyst from viscera, length 30 mm,, diameter 

 in middle 5 mm., thickening a little toward one end, where there 

 was an accumulation of waxy, degenerate tissue; length of plero- 

 cercus 30, of larva 20.5, 1 fish examined. 



Thunnus thynnus. 



1914, July 29: 1 cyst from serous coat of intestine; 5 by 3 mm.; 

 hooks agree with this species, but scolex smaller than in typical 

 specimens, 1 fish examined. 



TrichiuTUS lepturus. 



1903, July 6 : 1 cyst, body cavity associated with O. crenacolle^ and 

 immature nematodes; scolex agrees in detail with this species, 1 

 fish examined. 



