492 



47) Phyllodistomum folium v. Olf. 

 Urinary bladder Esox lucius L. (Pike). 



1,5X0,58. Neck broadens slightly from mouth to near ventral 

 sucker where the body expands rapidly at first and then gradually 

 until the greatest breadth is reached when it narrows rapidly to a 

 blunt point often with a median notch. Ventral sucker 1,5 to 

 2 times diameter of oral, its centre a little in front of the middle of 

 the body. For the specimen selected, anterior sucker 0,138X0,123, 

 ventral sucker 0,184X0,200, situated 0,693 from anterior end. Large 

 sense papillae along sides of neck. Genital opening some distance 

 in front of ventral sucker. Small, compact vitellaria just behind 

 ventral sucker and each side of the middle line. Ovary and second 

 testis towards one side, first testis opposite the space between them 

 on the other side. All rather compact — ovary larger than vitellaria, 

 and testes still larger and longer with more irregular boundaries. 

 Eggs scattered over all post acetabular region. 



This agrees pretty well with the European worm as described by 

 Looss, the greatest difference being in the unequal size of the 

 suckers. 



48) Phyllodistomum superium. 

 Urinary bladder 



Ameiurus nehulosus Le S. (RuUhead). 



Perca ßavescens Mit. (Perch). 



New species: superlus^ grand. 2,85X2,18. Mouth-sucker 0,27, 

 ventral sucker 0,46, 1,26 from anterior end. Neck 0,72, body from 

 centre of ventral sucker very broad. Genital glands deeply lobed — 

 the large testes with 10 or 12, cut almost to the centre. My largest 

 specimen measures 5,7X2,5 but its testes are small and all the ge- 

 nital glands are in a small space behind the ventral sucker, not 

 exceeding one third of the length of the post-acetabular body. 



The specimens from the perch differ from those from the bull- 

 head in being more lengthened, the suckers being of nearly the same 

 size, the vitellaria being spherical, and the body crowded with eggs 

 arranged in rows. 



49) Deropristis hispidus Abil. 

 Posterior part of intestine of 



Acipenser ruhicundus Le S. (Lake Sturgeon). 11X1- Ventral 

 sucker rather smaller than oral, situated one-quarter from anterior 

 end. Spines increase slightly in size back to ventral sucker and than 

 lessen again. Prepharynx, pharynx, and oesophagus of about equal 

 length. Origin of caeca nearer oral than ventral sucker. Small 



