438 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



Dimensions, in millimeters, balsam mounts: 



Length 30.00 16.00 113.00 138.00 



Scolex: 



Length .84 .49 1.20 L 26 



Breadth .84 .49 LOO L 26 



First segment: 



Length .07 .05 .08 .14 



Breadth .68 .42 .63 1.05 



Median segment: 



Length .25 .35 .24 .15 



Breadth 1.05 .81 2.24 2.50 



Posterior segment: 



Length .35 .30 .50 .49 



Breadth .70 .63 L 20 1.56 



Maximum length of strobila, in formalin, 180 mm.; ova 0.07 by 0.03 

 to 0.04 mm. 



Specimens from Pomatomus saltatrix. — Recorded by me ^' under the 

 nume Dibothrium crassiceps (Rudolphi). 



Specimens from Sphoeroides maculatus. — Three strobilae, with 

 scoleces (U. S. N.M. No. 8898), collected June 6, 1914, length of each 

 about 15 mm..; one, scolex missmg, length 30 mm.; 10 fishes examined 

 by Vinal N. Edwards, who reported worms in 4. Measurements in 

 balsam: Length of first segment 0.1 1 mm., breadth 0.23 mm. ; posterior 

 segments, length 0.28 m.m., breadth 1.12 mm. False articulation of 

 segments, giving the appearance of their arrangement in the strobila 

 by twos, is a conspicuous feature. 



Specimens from Squalus acanthias. — Two strobilae (U.S. N.M. No. 

 8899) collected September 22, 1913, from one of eight dogfishes 

 examined by Edwards. Aggregate length of strobilae and fragments 

 in formalin 72 mm. Length of longest strobila in balsam 35 mm. 

 Ova 0.063 to 0.075 by 0.033 to 0.039 mm. These worms were doubt- 

 less introduced with food. 



Specimens from Urophycis chuss. — Two strobilae with scoleces 

 and fragment collected May 9, 1913, from 15 fishes examined by 

 Edwards. Lengths in formalin 18, 24, and 14 mm. Breadth of 

 scolex 0.42 mm., maximum breadth about 0.65 mm. (U.S. N.M. No. 

 8900). 



Specimens from Urophycis tenuis. — Two strobilae collected May 

 9, 1913, fromthree fishes examined by Edwards; lengths 7 and 24 mm. 

 A few fragments from one fish June 30, 1924, no scolex seen; whiting 

 among the stomach contents. 



2' Bull. U. S. Fish Comm., vol. 19, p. 451, 1901; Bull. U. S. Bur. Fish., vol. 31, p. 585 1911. 



