22 Franklin D. Barker and George W. Covey 



intestines and the body walls, extending from the region of the genital 

 pore to near the anterior testis." 



Correction (1905: 690) : 



" The position of the testes, ovary, uterus and vitellaria certainly entitle 

 it to be considered with the Telorchis group. The long distance between 

 ventral sucker and genital pore, but especially the position of the latter, 

 are important differences. Upon renewed examination I am con- 

 vinced that the penis-sac and vagina cross under the left coecum and 

 open on the dorsal surface, and that the exserted penis lies above the body. 

 There is a prepharynx. The vitellaria do not extend so far in front as I 

 indicated in the drawing. The largest eggs measure 0.042 X 0.021 mm." 



On a whole Stafford's description and drawing (PI. I, fig. 2) 

 are a little meager and indefinite, but we can draw the following 

 points of comparison from it. In the first place the host is 

 Chrysemys picta while my form is from Chrysemys marginata. 

 The position of the cirrus pouch and vagina and of the genital 

 pore with their relations to the ventral sucker are practically 

 identical with those of my specimens, which doubtless places them 

 at least in the same subgenus. Other points of agreement are the 

 position of the testes and their separation from the ovary by the 

 mass of the uterus. As to the uterus nothing can be got from 

 Stafford's description and drawing except its position between the 

 caeca, and between the ovary and the anterior testis. In fact his 

 drawing would seem to indicate that it was not arranged in two 

 definite descending and ascending lateral fields as is that of my 

 species. He says that the ovary is just "a. little in front of the 

 middle of the body. . . ." In my specimens it lies usually at or 

 just a little posterior to the junction of the anterior and middle 

 thirds of the body, bearing the same relation to the two branches 

 of the excretory system that his does. According to his drawing 

 the ovary in my species seems to have about the same relation to 

 the acetabulum as in T. an gust 11 in, but both are placed farther for- 

 ward, nearer the division point of the intestine. At first Stafford 

 says the vitellaria extend from the region of the genital pore back 

 to near the anterior testis, with which statement his drawing 

 agrees ; then he says, in his correction, " The vitellaria do not 

 extend so far in front as I indicated in the drawing," but he 



214 



