372 



BULLETIN OF THE BUREAU OF FISHERIES. 



surrounded by stout but unequal spines, which are 33 in number in the sketch (fig. 190); 34 were 

 counted in the specimen. The number is probably variable. Ventral sucker larger than oral, its 

 posterior border situate'! at about the anterior fourth of the entire length of the worm; pharynx large, 

 long pyriform, remote from the mouth. Testes two, large, near posterior end, on median line, end 

 to end, the posterior one the larger; cirrus-pouch long, behind ventral sucker; genital aperture not 

 distinctly seen, but evidently on or near median line, close in front of ventral sucker. Ovary near 

 front end of anterior testis; uterus in front of ovary, its folds mainly between ovary and cirrus-pouch; 

 ova moderately numerous and relatively huge; vitellaria diffuse, abundant posteriorly, and extending 

 laterally to a point near base of cirrus-pouch. 



1901.— Aug. 1, 3. 



Dimensions, life, ventral view, in millimeters: Length 9; diameter of head 0.65; of neck, narrowest 

 part, 0.5; transverse diameter of oral sucker a little difficult to make out on account of the spines but 

 about 0.56; breadth of ventral sucker 0.7, length of same 0.9; diameter of globular ovary 0.3; length 

 of anterior testis 0.84; of posterior testis 1.16; breadth of each 0.56; ova II. 1)7 by 0.04 in the two 

 principal diameters; length of larger oral spines 0.15. Pharynx, same specimen in glycerin, length 

 0.45; breadth 0.21. Number of oral spines 34. 

 Id. Distomum sp. [Figs. 171, 172.] 



1901. — Aug. 3, 1. Dimensions, life, lateral view, in millimeters: Length 1; longitudinal diameter 

 of oral sucker 0.08, of pharynx 0.05, of ventral sucker 0.17; ova much smaller at one end than the 

 other, almost pointed-oval, 0.04 by 0.02 in the two principal diameters. 



1902.— Aug. s, 1. 



See No. 17 under Paralichlhys dlbigiUtus. 



11. Distomum pudens Linton. 



1902. — Aug. 8, 1, in poor condition and crushed by accident under cover glass. Dimensions, life, 

 in millimeters: Length 1.3; diameter of oral sucker 0.12, of pharynx 0.10, of ventral sucker 0.11; 

 distance of pharynx from oral sucker 0.27, from ventral sucker 0.04; neck conical. 



12. Distomum dentatum Linton. 



111112 — Aug. S, 1, small, immature; length 1.2 mm. 



13. Distomum mlde-inflatum Stossich. 



1902. -Aug. S. 1. in cyst. 



Coryphsena hippurus, Common Dolphin. 



This fish was sent to the laboratory by Mr. Charles S. Wallace, of Morehead City, N. C. 



.U'AXTHOI EI'HAI.A. 



I. Echinorhynchus sagitlifer Linton. 



One, immature; encapsuled on the viscera. 



U 



NEMATODES. 



.' Iscaris incresct ns Molin. 



One, jaws short and broad; post-anal region very short. 

 3. Ascaris sp. 



Fragments; one of them the posterior end of a male, with long conical post-anal region. Three 

 pie-anal and four post-anal papilla- were seen in side view . 

 -1. Immature nematode [Ascaris\. 



Type with elongated basal part of oesophagus and corrugated post-anal region. 

 .">. Ichthyonema sp. 



Fragments of female ( Ha from one 0.036 by 0.018 mm., from another 0.032 by 0.016 mm. in the 

 tw.. principal diameters. 



