A New Species of Trematode 21 



ynx is immediately before the division of the intestine and there- 

 fore that no esophagus exists, to be consistent with these facts, 

 it seems to me'that Braun should have placed T. pleroticus (Brn.) 

 and T. bifurcus (Brn.) in the subgenus Telorchis instead of in 

 the subgenus Cercorchis. 



As previously stated the form which I have described differs 

 from all the species included in the subgenera Telorchis and 

 Cercorchis in the position of the cirrus pouch and genital pore 

 with the exception of T. angustum Stafford and it only remains 

 to determine whether or not it is identical with T. angustum 

 (Stafford). The following is Stafford's description (1900: 407) 

 and his correction (1905: 690) quoted in full: 



" The worm here referred to I found in the intestine of the Painted 

 Turtle (Chrysemys picta). It is a long, narrow {angustum) , very thin 

 animal. Its length, when mounted, is 3.150 mm, its breadth 0.455 mm- 

 The anterior sucker measures 0.125 mm; the posterior, ventral sucker 

 0.095 mm broad, is situated 0.875 mm farther back. 



" The pharynx, 0.075 mm long, is situated 0.050 mm from the mouth- 

 sucker, and there is another, longer, constricted, piece, the esophagus, 

 0.225 mm between it and the forking of the intestine. The latter is very 

 Hke the corresponding part in the preceding species [Dist. chelydrae n. sp.] 

 parasitic in the Snapping Turtle. 



" The unpaired part of the excretory system branches, I think, at the 

 posterior testis. 



" The testes are found, one behind the other, between the ends of the 

 intestinal caeca, and the duct from the anterior one is turned to the right 

 side. The penis is a long narrow organ (length 0.5 mm), lying obliquely 

 across the left caecum, with its base to the right of the ventral sucker and 

 its apex opening on the ventral surface, near the left margin, a little pos- 

 terior to the line traversing the forking of the intestine. There is a penis 

 sack containing a vesicula seminalis and the end of the intromittent organ 

 is, in the mounted specimen I am describing, exserted from the genital 

 pore and bent back under the body. The ovary lies behind the ventral 

 sucker, a little in front of the middle of the body and between two 

 enlarged lateral vessels of the excretory system. Behind it is the yolk 

 reservoir with the transverse vitelline ducts. The anterior end of the 

 oviduct — the vagina — lies on the opposite side of the ventral sucker from 

 the penis-sack and opens with the latter at the genital pore. Eggs occupy 

 the body from the sucker to the anterior testis but chiefly behind the 

 ovary and between the intestines. The vitelline glands lie between the 



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