28 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 81 



coils are more closely packed than those figured by Poirier (1886) for 

 this species, the distribution of the uterine coils being essentially the 

 only character by which this species could be differentiated from 

 O. tenv/icoUis { = 0. felineus). It is also possible that O. entzi^ de- 

 scribed by von Ratz (1900) from the gall bladder of Ardea purpu- 

 rea^ and 0. geminus, described hj Looss (1896) from the liver of 

 Milvus parasiticivs, are species identical with O. tenuicoUis, since 

 the characters given fall within the range of variation exhibited in 

 the latter species. 



It appears that in the case of O. teiiuicoUis there is a lack of host 

 specificity, as is also the case for Gryptocotyle lingua and certain 

 other trematodes. 



Genus CYCLORCHIS Luhe. 1908 



Generic diagnosis. — Opisthorchiinae : Body more or less spindle 

 shaped, the maximum width being near the equator. Cuticle with- 

 out spines. Suckers about equal in size. Digestive tract and excre- 

 tory vesicle as in Opisthorchis. Testes globular, situated in poster- 

 ior fourth of body. Ovary and adjacent structures as in Opisthor- 

 chis. Vitellaria lateral, situated in posterior half of body, but not 

 extending caudally beyond level of seminal receptacle. Uterine coils 

 loosely arranged and extending laterally beyond limits of ceca. 



Type species. — Cyclorchis amphileucus (Looss, 1896) Liihe, 1908. 



CYCLORCHIS CAMPULA (Cobbold, 1876) Luhe, 1908 



Plate 8, Figure 31 



Synonyms. — Distoma campula Cobbold, 1876, p. 40; Metorchis 

 campula (Cobbold, 1876) Looss, 1899, p. 565; Opisthorchis campula 

 (Cobbold, 1876) Looss, 1899, p. 559. 



Description. — Cyclorchis: Body elliptical, about 3 mm long by 1 

 mm wide, slightly more attenuated anteriorly than posteriorly. Oral 

 sucker subterminal; acetabulum about the same size as oral sucker, 

 situated about one-fourth of the body length from the anterior end. 

 Esophagus short; intestinal ceca relatively wide and sinuous, ex- 

 tending to posterior end of body. Genital pore preacetabular ; testes 

 ovoid and situated diagonally to the long axis in the posterior fourth 

 of body. Ovary small; seminal receptacle large. The body which 

 Cobbold says is " apparently the ovary " is probably the distended 

 seminal receptacle, and the smaller body immediately in front of it 

 is probably the ovary. Vitellaria (?). The uterus passes poster- 

 iorly and forms a transverse loop between the ovary and testes, and 

 then passes anteriorly in transverse loops which extend laterally be- 



