4 PROCEEDHiTGS OF THE NATIONAL MUSEUM tol. 78 



6. Male 5.3 to 6.2 mm. long; testes 28 in number and confined to anterior half 



of body ; female longer than male 0. pricei. 



Testes extending into posterior half of body ; female shorter than male 7. 



7. Male 8 to 10.6 mm. long ; testes 90 to 110 in number ; intestinal ceca in female 



united immediately caudad of ovary 0. intermedia. 



Male to 7 mm. long ; testes 65 in number ; intestinal ceca in female unite a 

 considerable distance caudad of ovary 0. odhneri. 



The writer desires to acknowledge his indebtedness to Dr. M. C. 

 Hall, Chief of the Zoological Division, Bureau of Animal Industry, 

 United States Department of Agriculture, for the facilities placed 

 at his disposal during a stay in the United States made possible by 

 a fellowship from the International Health Board of the Rockefeller 

 Foundation, and also to Dr. Emmett W. Price for his helpful advice 

 in the preparation of this paper. 



REFERENCE 

 Price, Emmett W. 



1929. A synopsis of the trematode family Schistosomidae, with descrip- 

 tions of new genera and species. Proc. U. S. Nat. Mus., Wash., (2789), 

 vol. 75, art. 18, pp. 1-39, pis. 1-15. 



EXPLANATION OP PLATE 



Ornithobilharsia pricei, new species 



, Figure 1. Male ; ventral view. 



2. Female; lateral view. 



3. Female ; genital system ; lateral view. 



4. Egg. 



ABBEEVIATIONS 



ac, acetabulum. ov., ovary, 



c, common cecum. ovd., oviduct, 



cb., cecal branches. sv., seminal vesicle. 



gc, gynaecophoric canal. t., testes, 



gp., genital pore. ut, uterus. 



0., ootype. vd., vitelline duct, 



oes., esophagus. vit., vitellaria. 



OS., oral sucker. 



U. S. GOVERNMENT PRINTING OFFlCEi I9S0 



