494 



caeum and opens ventrally near the side of the body on a level with 

 the posterior end of the oesophagus. Vitellaria lateral, from the oeso- 

 phagus to the posterior end. 



54) Protenteron diaphanum. 



In slime of intestine of 



Amhloplites rupestris Raf. (Rock Bass). 



New genus, new species: TtQaJrog, first; svtsqov, intestine; dia- 

 /?7mwM5, transparent. A living specimen measured 1,54X0,385. Broad- 

 est at middle, narrowed behind. Mouth-sucker terminal, 0,186. 

 Ventral sucker small, 0,62, situated 0,57 from the anterior end. Skin 

 with fine spines. Prepharynx longer than either pharynx or oeso- 

 phagus. Short caeca diverging and falling short of ventral sucker or 

 scarcely passing it. Black eyespots lateral from pharynx. Testes 

 obliquely side by side in middle of post-acetabular body. Ovary a 

 little in front of left testis. Uterus reaching to posterior end — older 

 eggs in the folds to the left. Egg 0,22X0,011. Genital opening 

 close in front of ventral sucker. Penis apparatus reaching behind 

 to the ovary. Vitellaria lateral, short, from the forking of the int- 

 estine to near the ovary. 



55) Diplostomum cuticola Dies. 



Encysted in liver of Amhloplites rupestris Ray (Rock Rass). 

 Cysts 1,309X0,693. Worm 1,078X0,385 in front and 0,539 be- 

 hind. Set free it measures 1,54 in length. 



56) Diplostomum parvulum.. 

 Encysted round the pharynx of 

 Semotilus hullaris Raf. (Chub). 



Two found in a large cyst free in intestine oîEsox lucius L. (Pike). 



New species; /jarüe^Zws, very small. 0,646X0,462. Elliptical, with 

 rounded or sometimes rather pointed ends. Smooth. Ventral sucker 

 rather larger than anterior, and rather broader than long. Breadth 

 0,154, situated 0,385 from anterior end. A quadrangular body, with 

 deep transverse slit and densely staining walls, immediately behind 

 ventral sucker. Immature. 



57) Gasterostomum pusillum. 

 Stomach and intestine of 

 Stizostedion vitreum Mit. (Dory). 



New Species: pusillus^ small. 0,77X0,35. Elliptical, when out- 

 stretched long and narrow. A living worm 1,23 in length. Skin 

 with very fine spines. Anterior sucker 0,154 across. Small mouth 

 in middle of body. Intestine small, extending in front and behind 

 the mouth. Ovary on the right side, behind the mouth. Testes in a 



