CESTODES FROM FISHES — LINTON 435 



and contracting at anterior end, wliich is occasionally invaginated; 

 many calcareous bodies in parenchyma. Measurements under slight 

 pressm-e: Length 1.4 mm., breadth 0.18 mm., nearly linear. 



Specimen from Remora remora. — One larval cestode collected 

 July 22, 1919, resembling cestode larvae from //. americanus, M. tom- 

 cod, and C. schoepji. Length 13 mm., breadth 2 mm., in balsam. 



Specimens Jrom Sarda sarda. — Previously recorded by me.^^ 



Specimens from Scomber scombrus. — Previously recorded by me.^^ 



Nmnerous cysts, 1 to 3 mm. long, each containing a plerocercus, were 

 found in washings from viscera August 3, 1906. 



Collected on 24 dates in August 1918 from 192 small mackerel, 108 

 to 185 mm. long, examined for stomach contents. On five dates cysts 

 containing plerocerci were found in eight fishes, one to few in each 

 fish. In one fish the cysts were on the viscera; in the other cases they 

 appeared to have been introduced with the food (U.S.N.M. No. 8890). 



Specimen from Seriola lalandi. — One vase-shaped plerocercus from 

 stomach wall, actively contracting and extending from 5 to 6 mm., 

 collected August 14, 1906. Diameter, anterior, 0.5 mm.; maximum, 

 near anterior end, 0.84 mm.; posterior end 0.21 mm. For a distance 

 of 3.5 mm. from the anterior end of the body filled with coarse granules, 

 for the most part oval-elliptical but assuming various shapes where 

 closely crowded together, about 0.084 to 0.105 by 0.039 to 0.06 mm. 

 (U.S.N.M. No. 8891). 



Specimens from Sphoeroides maculatus. — Six puffers, two on each of 

 three dates in August, and nine on one July date, out of a large 

 number of puffers examined, had from a few to rather numerous 

 larval cestodes encysted on the wall of the intestine. Length of one 

 cyst 2.5 mm., diameter 0.35 to 0.56 mm. 



Specimens from Stenotomus chrysops. — One plerocercus from young 

 scup collected August 9, 1916, by Dr. G. A. MacCallum. 



A small scup, 10 mm. long, with white cysts showing through the 

 body wall was brought to my attention by Miss Cable, July 27, 1933. 

 The cysts contained plerocerci with calcareous bodies. Three, com- 

 pressed slightly, measured: 1.33 by 0.46, 1.4 by 0.42, and 1.89 by 

 0.7 mm. 



Specimen from Syrictes fuscus. — One from a 45-mm. fish col- 

 lected July 15, 1919. Length 0.37 mm., breadth 0.15 mm., thickness of 

 cuticle 0.006 mm., diameter of calcareous bodies 0.012 mm. (U.S.N.M. 

 No. 8892). 



Specimen from Tautogolabrus adspcrsus. — One vase-shaped plero- 

 cercus, active, the anterior end, with short spines, capable of consider- 



" Proc. U. S. Nat. Mus., vol. 19, p. 789, pi. 9, figs. 2, 3, 1897; Bull. U. S. Fish Comm., vol. 19, pp. 278, 

 300, fig. 100, 1901. 

 " Bull. U. S. Fish Comm., vol. 19, p. 445, 1901; Bull. U. S. Bur. Fish., vol. 31, p. 586, 1911. 



