TREMATODE GENUS BRACHYCOELIUM BYRD 191 



tions between these specimens and Holl's material should be noted. 

 The body is slightly smaller ; the suckers are more nearly equal, their 

 sizes having a ratio of 8: 5 rather than 2:1, as in Holl's specimens; 

 acetabulum more cephalic in position; ovary more nearly rounded, 

 slightly smaller; testes slightly larger; vitellaria more extensive. 

 These differences are not deemed distinctive enough for the creation 

 of a new species for the present material. The excretory system (pi. 

 8, fig. 6) and ovarian complex (pi. 8, fig. 7) are figured in detail for 

 the species in question. 



BRACHYCOELIUM LYNCHI Ingles, 1936 



Brachycoeliurn lynchi was described by Ingles (1936) from the in- 

 testine of the frog Rana aurora, collected at Mount Shasta City 

 (Siskiyou County), Calif. Ingles states that B. lynchi most closely 

 approaches B. daviesi in relationship. It is my opinion that the con- 

 tinuous bridge of vitellaria over the dorsal portion of the anterior 

 end of the body in B. daviesi is sufficient to separate the two species 

 definitely, since in B. lynchi the vitellaria are confined to the lateral 

 fields. The anterior position of the testes definitely separates this 

 species from all my material. 



BRACHYCOELIUM STORERIAE Harwood, 1932 



This species of fluke was described by Harwood (1932) from a 

 single specimen taken from the intestine of DeKay's snake {Storeria 

 dekayi) collected from the vicinity of Houston, Tex., and represents 

 the second species of the genus to be described from snakes. I feel 

 that the species must be considered as valid until more material is 

 available for study. None of the specimens in the present collection 

 can be assigned to this species, although eight of the specimens show 

 a close resemblance to it. 



BRACHYCOELIUM DORSALE. new species 



Plate 9, Figure 2 



Eight specimens of this species were taken from the intestine of 

 the salamander Anibystoma opacum, collected from the vicinity of 

 Pearl Kiver, La. At first sight the flukes appeared to be identical 

 with B. storeriae, but on closer examination they were found to rep- 

 resent a new species. The dorsal distribution of the vitellaria sug- 

 gests the specific designation. 



Description. — Body elongated, almost cylindrical, with parallel 

 sides and gently rounded ends; 1.28 mm long by 0.49 mm wide. 

 Cuticle thin, armed anteriorly with very delicate spines as far pos- 

 terior as middle of posttesticular region of body. Oral sucker sub« 



115119—37 2 



