— 105 — 



This character which sharply distinguishes our parasite 

 from the other Trematodes— in which, as it is Imown, the ope- 

 ning of Laurer's canal is situated on the dorsal surface of 

 the body— was the chief reason for founding the new genus 

 LaurerieUa. On the other hand, the character of structure and 

 relations of all the other organs to each other (particu- 

 larly the arrangement of the genital glands, the character of 

 the uterus, vitelline glands etc.) guarantee the genus Laure- 

 rieUa a firm position in the family Allocreadiidae. 



C. Fam. Lecithodendriidae Odhner. 



In the collection of Prof. Dogiel and Sokolov there is a single 

 representative of the fam. Lecithodendriidae (subf am. 

 Pleurogenetinae L.) be] onging to the genus Ganeo 

 Klein 1905. 



III. Genus Ganeo Klein 1905. 



Diagnosis: 



Small Trematodes with body of an elongated oval shape. 

 The cuticle is covered with small spines in the anterior part 

 of the body. The oral and ventral suckers are nearly equal 

 in size. The latter is situated on the border of the anterior 

 and middle thirds of the length of the body. The elongated 

 oesophagus passes into the intestinal trunks which do not 

 reach the end of the body. The genital aperture is situated 

 on the left side of the body, and opens on its left edge into 

 a deep cavity formed by the invagination of the cuticle (ge- 

 nital cloaca), and situated in the anterior part of the body at 

 about the level of the middle of the oesophagus. The testes 

 are arranged in the anterior third of the body, the foremost 

 testis being situated anteriorly to the ventral sucker, and the 

 posterior testis— with its posterior edge nearly at the same 

 level with it; or the testes are arranged both anteriorly and 

 posteriorly to the ventral sucker. The ovary is behind the 

 testes. The pseudoburs a cirri is elongated, curved, and reaches 

 the ventral sucker with its posterior edge. The viteUine glands 

 are arranged near the lateral margins of the body in the area 

 of its middle third. The uterus occupies the space between 

 the ventral sucker and the intestinal trunks reaching the 

 hinder end of the latter, or the very end of the body. The 



