PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. 393 



aperture; distance of anal aperture from posterior tip 0.18; lengtb of oesophagus 0.42; oesophagus 

 nearly cylindrical, increasing uniformly from 0.045 to 0.06 in diameter; length of copulatory spines 

 0.12. The papillae were not made out very satisfactorily; about 16 were counted in lateral view, very 

 minute, and all preanal. The most posterior papilla was nearly 0.4 millimeter in front of the anal 

 aperture. From this the papillae continue at nearly regular intervals for about 0.8 millimeter. July 

 25, 2. [See tigs. 45 and 4(S.] One of these, a female, yielded the following measurements in 

 millimeters: Length 2; length of (esophagus 0.36; distance from anal aperture to posterior tip 0.18; 

 diameter of head 0.03, at anal aperture 0.(14, at genital aperture 0.07; distance of genital aperture from 

 posterior end 0.54. July 28, 1 male, associated with No. 5, but about three times as long. [See 

 tigs. 4:; and 44.] July 29, 2, same type as those of July 17 and 25. 



CEST0DE9. 



7. Scolex polymorphous Rudolphi. 



1901. — July 19, few: intestine. July 31, few, small; intestine. 



8. Larval Cestode. 



1901. — July 17. a flask-shaped, slender larva, associated with No. 10. 



CBSTODES. 



9. Rhynchobothrium sp. 



Probably larval stage of R. longispine Linton. 



Type with oval cysts; small larva with relatively long hooks. 



1901. — July 1, small cysts on viscera. 



1002. — July 17, 22, Aug. 7, 11, few on each date. The hooks on the specimens collected in 1901 

 were noted as resembling those figured in Proceedings of the National Museum, vol. xix, pi. 

 lxiii, tigs. 4, 5. 



10. Tetrarhynchus bisulcatus Linton; encysted in stomach-wall. 



1901. — July 17, few. July 19, 1. July30, 1 in one lot; several in another on same date. Aug. 10, 

 2 Aug. 24, 1. Aug. 30, 1. 



TREMATODES. 



11. Distomum appendiculatum Rudolphi. 



1002. — Aug. 21, 1. Dimensions of living worm in millimeters: Length 1; diameter 0.23; diameter 

 of oral sucker 0.06, of ventral sucker 0.13; ova 0.025 by 0.011. 



12. Distomum monlicellii Linton. 



1002. — Aug. 21, 1, not in good condition. 



13. Distomum viteUosum Linton. 



1902.— July 29, few. July 31, 2. Aug. 8, 11, few. Aug. 16, 2. 



14. Distomum valde-inflatum Stossich. 

 1002. — Aug. 8, few, in globular cyst-. 



15. Distomum globiporum Rudolphi. [Figs. 173, 198, 199.] 



1901. — July 11, 1, not in good condition. Dimensions in millimeters, life: Length 3; breadth 0.75; 

 diameter of oral sucker 0.22, ventral sucker 0.25; pharynx length 0.15; breadth 0.11; ovum 0.096 and 

 0.062 in the two principal diameters. July 17, 2; in one of the worms ova were noticed which were 

 beginning to segment. No spines were noted on the foregoing, while those collected on the three 

 following dates were armed with spines which, however, were small and inconspicuous. These have 

 many points in common with a distome from Opsanus l<m (Bulletin U. S. Fish Commission for 1899; 

 A. p. 469; tig. 324). Aug. 10; 1, a distome with low, fiat, squarish spines along dorsal side and along 

 margins of neck. Color, dirty greenish-yellow by transmitted light. Dimensions in millimeters, life: 

 Length 3.3; breadth 1.26; diameter oral sucker 0.42, ventral sucker 0.52; pharynx, length and breadth 

 each 0.12; oesophagus short, about length of pharynx; intestinal rami extending nearly to posterior 

 end; suckers and their apertures nearly circular. When the specimen was fixed over the flame under 

 pressure the oesophagus contracted so that the branches of the intestine appeared to originate immedi- 

 ately behind the pharynx. Aug. 17; 1 [fig. 198], evidently same species as the specimen collected 

 on Aug. 10, but smaller. Spines on neck and anterior part of body mainly dorsal, ventral spines only 

 in patches on either side of the pharynx. Ova, 0.103 mm. and 0.002 mm. in the two principal 



