28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



Hosts. — Primary, birds (duck, presumably Anas 'platyrhynchos do- 

 mestica) secondary, snail {Lymnaea radix) . 

 Location. — Portal and intestinal veins. 

 Distribution. — Formosa. 



Genus DENDRITOBILHARZIA Skrjabin and Zakharow, 1920 



Generic diagnosis. — Bilharziellinae : Body of both sexes elongated. 

 Cuticle without spines or tubercles. Suckers absent. Digestive sys- 

 tem similar to that in Bilharziella; common cecum long, zigzag, and 

 provided with short, club-shaped or branched, lateral ceca. Genital 

 pore of male in anterior part of body and to the left of median line. 

 Testes numerous, situated on each side of the common cecum and ex- 

 tending from the cecal union to the posterior end of body. Ovary 

 spiral and situated between the cecal branches. Vitelline follicles 

 numerous, situated along the course of the common cecum. 



Type species. — Dendritohilharzia pulverulenta (Braun, 1901) 

 Skrjabin, 1924. 



This genus has many characters in common with Bilharziell-a., but 

 the writer regards the absence of suckers and the branched condi- 

 tion of the common cecum as characters warranting the recognition 

 of DendHtobilhrn^zia as a valid genus. Since Dendritohilharzia 

 odhneri Skrjabin and Zakharow, 1920, was later recognized by Skrja- 

 bin (1924) as identical with BilharzieUa puLvervlenta Braun, the 

 name of the type species becomes D. pulverulenta (Braun, 1901) 

 Skrjabin, 1924. 



KEY TO THE SPECIES OF DENDRITOBILHARZIA 



Male 8 to 8.3 mm. long by 1 to 1.5 mm. wide ; female 1.57 mm. long by 0.29 mm. 

 wide ; in Querquedula guerquedula and Anas platyrhynchos. 



D. pulverulenta, p. 28. 

 Male unknown. Female 14.2 mm. long by 1.41 mm. wide ; in Pelecanus onocrotalus, 



D. loossi, p. 29. 



DENDRITOBILHARZIA PULVBRULENTA (Braun, 1901) Skrjabin, 1924 



Figures 53-54 



>Synony7ns. — BilharzieUa pidverulenta Braun, 1901, pp. 946-947 

 (in Anas querquedula; Africa) ; Dendritohilharzia odhneri Skrjabin 

 and ZakharoAv, 1920, pp. 2-4, 6. 



Specific diagnosis. — Dendritohilharzia. 



Male 8 to 8.3 mm. long by 1 to 1.5 mm. wide. Cuticle without 

 spines or tubercles. Suckers absent. Esophagus 690^ long; in- 

 testinal ceca united posteriorly about 920/x from the esophageal bi- 

 furcation; common cecum long and zigzag, and provided with short 



