CESTODES FROM FISHES — LINTON 425 



Measurements in balsam 

 Scolex: 



Length 0.65 1.33 1.05 



Maximum breadth .19 .30 .35 



First segment : 



Length .12 .14 .28 



Breadth .12 .25 .11 



[. 05 . 054 . 062 



Ova -^bv by by 



[. 03 . 036 . 032 



Specimen from Clupea harengus. — One immature (U.S.N.M. No. 

 8863) collected May 11, 1916; segments not yet developed; scolex 

 in balsam, length 1.05 mm., maximum breadth 0.21 mm. 



Specimens from Hemitripterus americanus. — Cestodes (U.S.N.M. 

 No. 8864) referred to this species were collected on two dates in 

 January, one in February, two in April, eight in May, four in June, 

 two in July, three in October, five in November, and three in Decem- 

 ber in 13 different years. Sixty-one fishes were examined on 32 

 dates, and this cestode was found in 46 of them on 30 of the 32 dates. 

 All examinations, except those of July, were made by Vinal N. 

 Edwards. In January he examined seven fishes and noted: ''Worms 

 in all, some of them 5 feet long." In one bottle that contains worms 

 from one fish collected in January there were 14 strobilae with scoleces, 

 maximum length 700 mm. On another date 3 strobilae were found 

 in one fish, aggregate length 300 mm., maximum breadth 4.5 mm. 

 On one date in February five fishes were examined, and Mr. Edwards 

 noted: "Stomach contained tautog and cunners, very many tape- 

 worms, some 6 feet when stretched." In a bottle containing worms 

 from one fish collected on this date there were 43 strobilae, which, 

 together with fragments, aggregated a total length of 1,223.5 cm,, 

 or 40 feet. 



On one date in April three fishes yielded 6 strobilae, maximum 

 length 540 mm., aggregate length 156.5 cm.; from one fish on another 

 date fragments of strobilae were obtained aggregating 354 mm. in 

 length. In May nine fishes were examined, each on a different date 

 and in seven different years. One to three strobilae were foimd 

 on each of eight dates, maximum length 1,045 mm., maximum 

 breadth 5 mm. On one date 210 strobilae were collected from one 

 fish, maximum length 175 mm., maximum breadth 2 mm., a very few 

 with ripe segments. 



In June, fishes were examined on three dates in different years, one 

 fish on each date. Three strobilae were found on one date and one 

 on each of the others, maximum length 500 mm., aggregate length 

 2,490 mm. 



In July, two fishes were examined on different dates in different 

 years. Several cestodes were obtained on one date and one on the 

 other, maximum length 250 mm., maximum breadth 2 mm. 



292965—41 2 



