116 PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXIII. 



line. The prostate is at the posterior border of the ventral sucker, a 

 little to the left. 



Dimensions, in millimeters, life: Length 2.25, breadth 0.54:; diam- 

 eter of oral sucker 0.10, of pharynx 0.06, of ventral sucker 0.13; ova 

 0.051 b}^ 0.036. Length of smaller specimens 1 and 1.5. 

 Distoimim, species from Bodianus fiihuis punctatus. (Plate X, fig. 70.) 



July 22, one, immature. Dimensions, in millimeters, life: Length 

 0.0, breadth 0.13; breadth of oral sucker, retracted, approximately 

 0.12; ventral sucker, length 0.10, breadth 0.12. Measurements of the 

 specimen in balsam show that the diameter of the two suckers and the 

 pharynx is about the same, namely O.OT; each a little wider than long. 



In the mounted specimen several granular bodies are disclosed which 

 are the rudiments of the reproductive organs. The anterior end is 

 beset with exceedingly minute spines. 



Dlstontmn, species from Sphyrxna sphyrsena. (Plate X, fig. 71.) 



July 17, three, in poor condition, as if macerated b}^ the digestive 

 juices of their host. The barracuda indeed may not be the proper 

 final host of these distomes. 



-Bod}^ elongated, the posterior half nearly linear, tapering to ante- 

 rior end; oral sucker lost in all the specimens; pharynx preceded by 

 a pre-esophagus and about two-thirds the size of the ventral sucker. 

 The ventral sucker and its aperture longer than broad. Testes two, 

 oval, on median line, separated from each other by a distance slightly 

 less than the length of one, the posterior testis situated at about its 

 own length from the posterior end of the body. Ovary globular and 

 placed in front of the anterior testis, from which it is separated by a 

 short interval. Vitellaria diffuse, posterior and lateral, extending 

 forwards to a point about 0.7 mm. behind the ventral sucker. Faint 

 indications of a seminal vesicle were seen behind the ventral sucker, 

 and of a setninal receptacle in front of the ovary. The ova are rather 

 large and numerous, the body being crowded with them for a distance 

 of 3.75 mm. in front of the ovary. 



Dimensions in millimeters of specimen mounted in balsam: Length 

 15; maximum diameter, at posterior testis, 0.*J6, at pharynx, 0.33; 

 pharynx, length 0.33, breadth 0.25; ventral sucker, length 0.15, 

 breadth 0.37; distance of pharanx from ventral sucker 1.8; distance of 

 posterior testis from posterior end 0.9; posterior testis, length 1.05, 

 breadth 0.60; anterior testis, length 0.90, breadth 0.54; distance 

 between testes 0.67; diameter of ovary 0.30; distance of ovary from 

 first testis 0.91; ova 0.06 by 0.03. The anterior end was macerated 

 and drawn out into a slender thread, the oral sucker being lost and 

 the pharynx about 0.75 mm. from the anterior end. On account of 

 the macerated condition of these distomes the absence of spines is 

 without sitrnificance. 



