14 PEOCEEDIXGS OF THE NATIONAL MUSEUM vol.81 



Hosts. — Leiolofisma laterale^ Pseitdacris triseriata, Hyla ciTterea^ 

 and Avxbystoma microsto^nmn. As the parasites from the last two 

 hosts mentioned are both immature, these two records must be re- 

 garded as tentative. 



Habitat. — Intestine, more frequently in the anterior half. 



Localities. — Houston and Hunts ville, Tex. 



Type spmmm.— U.S.N.M. Helm. Coll. No. 30876; additional 

 specimen, No. 30877. 



Remarks. — Brachycoelium daviesl differs from most other species 

 of Brachycoelium in many ways. The body when relaxed is pro- 

 portionately wider, the esophagus is shorter, and the ovary is cepha- 

 lic to the acetabulum. It is distinguished from all but B. trituri 

 by the ratio of the acetabulum to the oral sucker, and from all but 

 B. sto7'eriae and B. tneridionalis by the presence of a transverse 

 bridge of vitellarian follicles between the lateral fields. 



Genus GLYPTHELMINS Stafford, 1905 



Miller (1930) has carefully redescribed the type species of this 

 genus, G. quieta, and partially revised the genus. He has shown 

 that Margeana Cort (1919) is a synonym of Glypthehnins. Since 

 Cort had already placed Margeana in the same group with Brachy- 

 coelium.., I refer GlyptJiehnins to the Brachycoeliidae. The follow- 

 ing species is the third of this genus to be described from North 

 American frogs: 



GLYPTHELMINS SUBTROPICA, new species 



Plate 1, Figuee 6 



Specific diagnosis. — GlypthelTnins : The body is 1.43 to 2.65 mm 

 long and 0.44 to 0.92 mm wide. The cuticula is covered with small 

 spines except at the extreme anterior end and a part of the posterior 

 end. The oral sucker varies from 0.16 by 0.18 mm to 0.32 by 0.34 

 mm, and the acetabulum varies from 0.1 to 0.16 mm in diameter. 

 The ratio of the oral sucker to the acetabulum approximates as 5 : 3 

 in young specimens, but in fully mature specimens it is nearer as 

 1 : 2. The distance from the cephalic margin of the acetabulum to 

 the anterior end is 0.59 to 0.92 mm. The oral sucker is closely fol- 

 lowed by a large muscular pharynx. This structure is always a 

 little larger than the acetabulum and varies from 0.12 by 0.15 mm to 

 0.19 by 0.27 mm. The esophagus is rather short, usually about the 

 length of the pharynx or slightly longer. The ends of the intes- 

 tinal ceca are removed from the extreme caudal end by a distance 

 of about 0.16 to 0.3 mm. On each side a group of glands extends 



