428 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



Specimens from Paralichthys oblongus. — Specimens from this fish 

 have been recorded by me^ mider the name Dibothrium punctatum 

 (Rudolphi). 



Collected on one date in May, four in Jmie, three in August, in six 

 different years; 17 strobilae obtained, maximum length noted 70 mm. 

 One of the two slides in the collection contains two scoleces and 

 fragments of immature strobilae aggregating a length of 85 mm., 

 maximum breadth 0.77 mm.; scoleces, lengths 1.33 and 1.61 mm., 

 breadths 0.22 and 0.26 mm.; first segments, lengths 0.3 and 0.24 mm., 

 breadths 0.16 and 0.17 mm. The other sHde contains one scolex and 

 fragments evidently belonging to the same strobila, total length 65 

 mm., maximum breadth 3 mm.; scolex length 2.31 mm., breadth 

 0.34 mm.; first segment length 0.21 mm., anterior breadth 0.33 mm., 

 posterior 0.42 mm.; ova 0.064 to 0.06 by 0.03 to 0.033 mm. (U.S.N.M. 

 No. 8872). 



Specimens from Pollachius virens. — Collected August 19, 1908, one 

 scolex and fragments of strobila, 10 and 25 mm. long, breadth 0.4 

 mm.; scolex length 0.7, breadth 0.28 mm. 



Specimen from Pomolobus pseudoharengus. — One immature col- 

 lected November 3, 1913. Length in formalin 14 mm.; scolex length 

 2.15 mm., breadth anterior 0.19 nam., maximum 0.52 mm., at base 

 0.21 mm.; first segment length 0.6 mm., breadth 0.25 mm.; length of 

 scolex in balsam 2 mm. The segments show a tendency to divide at 

 middle of length (U.S.N.M. No. 8873). 



Specimens from Poronotus triacanthus. — Previously recorded from 

 this fish by me under the name Dibothrium angustatum (Rudolphi).^" 



Specimens from Seriola zonata. — Immature strobilae collected 

 September 16, 1913, lengths 2, 16, and 22 mm. m formalin (U.S.N.M. 

 No. 8874). 



Measurements 



Scolex: 



Length 1.19 1.50 



Breadth .21 .28 



First segment: 



Length .28 .18 



Breadth .08 .14 



Average length of first 5 segments .11 .21 



Specimens from Trachurops crumenophthalmus. — Recorded from 

 this fish as Dibothrium punctatum (Rudolphi) by me " and by Cooper. ^^ 



Collected on two dates in August, four in September (U.S.N.M. 

 No. 8875), and one in October, 1 to 12 on each date; immature 

 strobilae with elongate scolex, segments usually longer than wide, 

 associated with vase-shaped plerocerci. Measurements in balsam: 



« Bull. U. S. Fish Comm., vol. 19, p. 484, 1901; Bull. U. S. Bur. Fish., vol. 31, p. 586, 1911. 

 •0 Bull. U. S. Fish. Comm., vol. 19, p. 454, 1901; Bull. U. S. Bur. Fish., vol. 31, p. 585, 1911. 

 » Bull. U. S. Fish Comm., vol. 31, p. 586, 1911. 

 " Illinois Biol. Mon., vol. 4, p. 388, 1919. 



