12 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.81 



level of the caudal boundary of the acetabulum, but the testis on the 

 ovarian side is slightly posterior to its mate. The genital pore is 

 slightly cephalic to the acetabulum. The cirrus sac, which contains 

 the seminal receptacle, usually resembles the shape of an inverted 

 comma and usually lies partially beneath the acetabulum. The ovary 

 is nearly globular, is lateral in position, and lies at the level of the 

 acetabulum. It measures 76;u, to 84/x in diameter. Mehlis's gland 

 lies medio-caudal to the ovary. The vitellaria lie between the middle 

 of the esophagus and the caudal end of the intestinal ceca. Two 

 yolk ducts become visible at the caudo-lateral limits of the vitellarian 

 follicles and extend in a curve from this point to a small yolk reser- 

 voir, dorsal to Mehlis's gland. The vitellaria extend from the caudal 

 margin of the oral sucker to the caudal extremities of the intestinal 

 ceca but not beyond. In the dorsal portions of the worm they extend 

 in a continuous band from side to side. The uterus fills the body 

 caudal to the testes. The eggs measure 29/i by 42/x. 



Host. — Triturus nieridionalis. 



Habitat. — Upper intestine. 



Locality. — Houston, Tex. 



Type specimens. — U.S.N.M. Helm. Coll. No. 30874; paratype. No. 

 30875. 



Remarks. — The host, T. meridionalis^ is so closely related to 

 T, vlridescens that for some time it was considered to be a variety of 

 the latter. A species of Brachycoelium — B. hosp^itale Stafford — has 

 already been described from T. vlridescens in Canada. A form of 

 Brachycoelium., which seems to be identical with B. hospitale, has 

 been found several times in specimens of Rana spJienocephala cap- 

 tured locally, but oddly enough it was not found in T. meridionolis. 

 The situation is further complicated by Holl's species B. trituri., from 

 the eastern form of the newt. Doctor Holl kindly loaned me two 

 specimens of B. trituri from his private collection. A comparison 

 of this material resulted in the following observations : 



B. meridionalis differs from B. hospitale and B. tritiiri by having 

 a continuous bridge of vitellarian follicles from one side to the other. 

 It further differs from B. hospitale by having larger intestinal ceca, 

 and the vitellaria do not extend so far caudad. 



BRACHYCOELIUM DAVIESI, new species i 



Plate 1, Figure 5 



Specific diagnosis. — Brachycoelium: The worms vary from 0.65 to 

 0.95 mm in length and from 0.3 to 0.55 mm in width. Those whose 



^ I take pleasure In naming tliis trematode after J. I. Davies, of the Rice Institute, in 

 recognition of tlie friendly interest he has taken in this work and of the assistance he has 

 given, particularly in matters involving technique. 



