489 



New genus and new species : (-cli-iog, imitator; augustus, narrow; 

 Cauda, tail. 7X1,25. Anterior half of pretty uniform breadth. Post- 

 erior half tapering somewhat abruptly, but variable, due to the 

 activity of the animal. Suckers equal but in some cases the ventral 

 is a shade smaller. It is situated in the middle of the length of the 

 worm in the most normal cases. The genital glands are flattened 

 against each other and crowded backwards near to the ends of the 

 caeca. In other respects the worm is similar to Magadistomum and 

 Azygia. Most of the specimens are immature and I was long of opin- 

 ion that they were the young of one or other of the two genera 

 mentioned. Towards the end of October however I found a few sex- 

 ually mature and these give quite a different impression. In the 

 12 mm Azygia I selected as example the ventral sucker is 2 mm 

 from the anterior end. In the 7 mm Mimodistomum it is 3,5 mm 

 from the end while the relatively long distance between sucker and 

 ovary is in marked contrast to the short distance between the latter 

 and the posterior end of the worm. The eggs of this species lie mid- 

 way in measurements between those of the two species it most 

 resembles and yet there is a considerable difference between them. 



43) Bunodera nodiilosa Zeder. 



Intes. Perca flavescens Mit. (Perch). ' 



3X1. Body cylindrical, broadest across middle, from ventral 

 sucker forwards narrowing into a neck. Ventral sucker scarcely 

 larger than oral. Oral 0,323, ventral 0,338, the centre of the latter 

 1 from the anterior end. A large living specimen slightly compres- 

 sed measured 4,02X1,62 and its suckers 0,387 and 0,465 but the 

 ventral sucker being in a thicker part of the body was more flatte- 

 ned out than the oral. Skin smooth. Pharynx, oesophagus, caeca 

 to posterior end. Ovary a little behind and to one side of the ven- 

 tral sucker. Receptaculum seminis behind the ovary. Testes sepa- 

 rated, the anterior about the middle of the post- acetabular part of 

 the body, and to one side, the posterior between and near the ends 

 of the caeca. Vitellaria lateral, extending from the neck to the po- 

 sterior end. All the named genital organs obscured by eggs which 

 crowd the body. Genital opening just in front of ventral sucker. 

 Penis apparatus short, not extending beyond ventral sucker. Scat- 

 tered pigment specks each side of oesophagus. Six papillae round 

 the anterior end: two ventro-lateral, two dorso-lateral, and two dor- 

 sal. They are placed in a vertical semi -circle above the mouth- 

 sucker, fully one- third from its anterior end, and standing out at 

 right angles to the surface. 



