AET. 17 PARASITES OF AMPHIBIA AND REPTILIA HARWOOD 37 



no fully ripened segments present. The scolex is 0.5 mm wide, and 

 distinctly marked off from the neck. The suckers are large, but 

 not so large relativelj'^ as in Oochoristica anolis. They measure 0.22 

 by 0.26 mm. The neck is about 0.35 mm wide and about 2 mm long. 

 It is rather difficult to tell just where segmentation begins, but as 

 usual the hrst segments are much broader than long. The mature 

 segments first appear about G5 mm from the scolex and continue 

 through about 35 mm before the eggs appear and the sex organs 

 begin to degenerate. In this worm the mature segments are some- 

 what broader than long. Extreme measurements are 0.8 to 0.9 

 mm in length and 1.18 to 1.2 mm in breadth. The genital pore lies 

 at the end of the anterior fourth or fifth of the lateral margin. The 

 cirrus sac is an elongate oval, measuring from 0.26 to 0.18 mm in 

 length and from 0.06 to 0.07 mm in breadth. From its inner end a 

 much coiled vas deferens runs mesad to disappear as it reaches the 

 ovary. The testes lie caudal and lateral to the ovary and vitellaria. 

 Frequently they extend cephalad nearly to the anterior border of the 

 ovary, but occasionally they only reach the middle of the ovary. 

 There are from 40 to 55 testes in each proglottid. The ovary lies 

 rather far forward in the segment, its anterior margin lying at the 

 level of the genital pore. It is a bilobed structure about 0.4 mm 

 wide. Behind it lie the shell gland and vitellaria in the order 

 named. A small seminal receptacle lies directly dorsal to the shell 

 gland. From it the vagina runs, at first anteriorly between the lobes 

 of the ovary, and then curves toward the lateral margin. The geni- 

 tal ducts pass between the lateral excretory tubes and dorsal to the 

 nerve. No fully ripened segments are present so it is impossible to 

 make any statements concerning them. 



Host. — EuTiieces fasciatus. 



Habitat. — Intestine. 



Locality. — Houston, Tex. 



Type spedmen.—U.S.'^.M. Helm. Coll. No. 30899. 



Remarks. — This description like the preceding is based on a sin- 

 gle specimen. It, therefore, becomes necessary to regard this as 

 a species inquirenda until more material is availabl'^. for study. The 

 differences noted between this form and the preceding lie in the 

 number and distribution of the testes, the shape of the cirrus sac, 

 the relatively broader segments, and the relatively smaller suckers. 

 Most of these differences are the same as those pointed out as the 

 important differences between 0. fibrata and O. anolis. I do not, 

 however, regard O. eu7necis as identical with O. fbrafa, because of 

 the difference in the number and distribution of the testes. Unfor- 

 tunately Meggitt does not mention the scolex in his description so 

 it is impossible accurately to compare this structure in the two 



