ART. 17 PARASITES OF AMPHIBIA AND KEPTILIA HARWOOD 31 



in the common genital pore near the right margin of the body. The 

 cirrus sac is 0.46 to 0.42 mm long and contains in its caudal portion 

 an elongate seminal vesicle. The excretory system is identical with 

 that of Protenes leptus. 



Host. — Pseudemys elegani^. 



Habitat. — Intestine. 



Locality. — Rosenberg, Tex. 



Type specimen.— V.S.'^.M. Helm. Coll. No. 30893. 



Remarks. — This species most closely resembles Protenes leptus 

 Barker and Covey, but from this form it is readily distinguished 

 by the location of the genital pore on the opposite side of the body, 

 the location of the opening of Laurer's canal, and slight differences 

 in the length of the cirrus sac and the location of the ovary and 

 acetabulum. Apparently it is also a slightly larger form. 



The two specimens upon which the above description is based were 

 found in company with several examples of Cercorchis texaniis, in 

 a turtle, which T. S. Chapman sent me from Rosenberg, Tex. 



Subfamily Auridistominae Stunkard, 1924 



Genus AURIDISTOMUM Stafford, 1905 



This genus is represented by a single species, which is already 

 known to be widely distributed. 



AURIDISTOMUM CHELYDRAE Stafford, 1905 



I have taken a single example of this parasite from the intestine 

 of each of two snapping turtles, Chelydra serpentina. 



Class CESTODA 



Family PROTEOCEPHALIDAE La Rue, 1911 



Genus PROTEOCEPHALUS Weinland, 1858 



The unsettled condition of the classification of this genus has 

 been thoroughly discussed by other authors. Meggitt (1927) lists 

 the species and gives tables for their determination. It is sufficient 

 to state here that all the following species definitely belong to 

 Woodland's (1925) Crepidohothnum group, or, as it has been more 

 generally known in the past, La Rue's (1914) genus Ophiotaenia. 



PROTEOCEPHALUS MAGNUS (Hannum. 1925) 



The original description of this species is based on a single speci- 

 men from the intestine of Rana catesheiana from Oklahoma. I en- 

 countered a tapeworm in the same host at Huntsville, Tex., and 



