CESTODES FROM FISHES — LINTON 433 



Bothriocephalus restiformis (Linton) Ariola, Boll. Mus. Zool. Anat. Comp. Univ. 

 Genova, 1896, p. 20; Arch. Parasit., vol. 3, pp. 422-423, 1900. 



One slide (U.S.N.M. No. 8885). 



BOTHRIOCEPHALUS species 



Plate 62, Figure 23 



Record is here made of an immature strobila (U.S.N.M. No. 8886), 

 collected August 9, 1928, from a flyingfish {Exocoetus volitans). 



Measurements in balsam: Length, including two fragments, 6.9 

 mm.; anterior breadth 0.42 mm., posterior 0.5 mm.; scolex length 

 1.18 mm., breadth 9.87 mm. The scolex, in dorsoventral view, is 

 bluntly sagittate, the bothrial pits marginal, with thickened and 

 irregularly sinuous border. The strobila appears to be unsegmented. 

 Rudiments of the genitalia begin about 1.5 mm. back of the scolex. 

 They lie along the median line as rather conspicuous granular clusters, 

 staining strongly with haematoxylin ; about 12 of them in the posterior 

 2 mm. of the strobila. 



A note on this pseudophyllidean cestode from a flyingfish was 

 pubhshed in 1934.^" 



BOTHRIOCEPHALUS species 



Larval (plerocercoid) stage, usually encysted, probably for the 

 most part belonging to the genus Bothriocephalus, is here recorded. 



Specimens from Acanthocottus aeneus. — Previously recorded by 

 me.^^ 



Specimens from Bairdiella chiysura. — Vase-shaped larvae with 

 abundant calcareous bodies, collected September 29, 1903. 



Specimen from Centropristes striatus. — One plerocercus from a 

 9-mm. fish, June 30, 1919. 



Specimen from Clupea harengus. — Cyst, about 1 mm. long, con- 

 taining a plerocercus, collected by Dr. Hahn, July 11, 1914. 



Specimens from Decapterus macarellus. — Previously recorded by 

 me.^^ 



Specimen from Decapterus punctatus. — One, actively contractile, 

 collected August 17, 1906. Length 1.2 to 1.6 mm.; anterior half, 

 more contractile than posterior, length 0.4 to 0.8 mm., breadth 

 0.14 mm,, diameter of posterior half, 0.07 mm. 



Specimens from Hemitripterus americanus. — Two, collected by 

 Vinal N. Edwards April 12, 1913. Length in formalin 3.5 mm., 

 breadth 1 mm.; plump, vase-shaped, yellowish. 



2" Trans. Amer. Micr. Soc, vol. 53, p. 66, 1 fig., 1934. 



« Bull. U. S. Fish Comm., vol. 19, p. 467, 1901; Bull. U. S. Bur. Fish., vol. 31, p. 586, 1911. 



" Bull. U. S. Fish Comm., vol. 19, p. 449, fiir. 228, 1901. 



