432 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



Specimens from Limanda ferruginea. — Recorded previously by me " 

 from this fish under the name Dibothrium pundatum (Rudolphi). 



Four strobilae and fragments collected December 10, 1904, from 

 three of five fishes examined ; length of longest 72 mm., maximum 

 breadth 5 mm. Three collected April 19, 1910, by Vinal N. Edwards 

 from two fishes examined (worms in each); maximum length 133 mm., 

 breadth 4.5 mm. 



Measurements in balsam: Scolex length 1.68 mm., maximum 

 breadth 0.55 mm.; first segment length 0.07 mm., breadth 0.6 mm.; 

 ova 0.06 to 0.072 by 0.033 to 0.039 mm.; average of 10: 0.065 by 

 0.036 mm. (pi. 61, fig. 11) (U.S.N.M. No. 8883). 



Specimens from Pseudopleuronectes americanus. — Recorded by me ^^ 

 from this fish under the name Dibothrium pundatum (Rudolphi). 



Collected from the winter flounder on one date in January, two 

 fishes examined, one strobila, immature, length 7 mm.; 8 on six dates 

 in February, 92 fishes examined, maximum length 80 mm.; 2 on one 

 date in April, 2 fishes examined, maximum length 60 mm.; 1 on one 

 date in August, 7 fishes examined, length 84 mm. ; 1 on two dates in 

 December, 14 fishes examined, length 267 mm. Collections, except 

 in August, by Vinal N. Edwards. 



Measurements in balsam: Scolex length 0.6 mm., anterior breadth 

 0.22 mm., middle 0.3 mm.; first segment length 0.14 mm., breadth 

 0.66 mm.; posterior segment length 0.21 mm., breadth 2.24 mm.; 

 ova, average of 10 sections, 0.069 by 0.034 mm. (pi. 61, fig. 12) U.S.N.M. 

 No. 8884). 



BOTHRIOCEPHALUS MANUBRIFORMIS (Linton) 



Dibothrium manubriforme Linton, Rep. U. S. Fish Comm. for 1886, pp. 456-458, 

 pi. 1, figs. 1-4, 1889 (from Tetrapterus albidus); Rep. U. S. Fish Comm. for 

 1887, pp. 728-731, 1890 (from T. albidus and Histiophorus gladius); Proc. 

 U. S. Nat. Mus., vol. 20, p. 429, 1897 (from Tetrapterus); Bull. U. S. Fish 

 Comm., vol. 19, pp. 447-448, 1901; Bull. U. S. Bur. Fish., vol. 31, p. 586, 

 1911 (from Istiophorus nigricans and T. imperator). 



Bothriocephalus manubriformis (Linton) Ariola, Arch. Parasit., vol. 3, p. 410, 

 1900.— Cooper, Illinois Biol. Mon., vol. 4, pp. 421-433, 1919. 



Specimens from Istiophorus americanus ^^. — Fifty strobilae, young 

 and adult, collected August 17, 1913, by Dr. G. A. MacCallum; 

 77 strobilae collected August 8, 1927, from intestine near pyloric 

 caeca, length 10 to 135 mm., maximum breadth 4 mm. 



BOTHRIOCEPHALUS RESTIFORMIS (Linton) 



Dibothrium restiforme Linton, Rep. U. S. Fish Comm. for 1887, pp. 722-728, 

 Pl- 1, fig s. 1-16, 1890 (from Tylosurus caribbaeus: U.S.N.M. No. 8885). 



" Rep. U. S. Fish Comm. for 1887, p. 732, 1890; Proc. U. S. Nat. Mus., vol. 20, p. 430, 1897; U. S. Bur. Fish., 

 vol. 31, p. 586, 1911. 



'8 Bull. U. S. Bur. Fish., vol. 31, p. 586, 1911. 



"According to Jordan, Evermann, and Clarlw's Check List, the Istiophoridae recorded as hosts of this 

 species of cestode represent but one species: Istiophorus americanus. 



