8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



Female 15 to 20 mm. long and 312|a to 358^ wide at the cecal union. 

 Cuticle smooth. Oral sucker subterminal, 60/x to TO^u, in diameter; 

 acetabulum pedunculated, 45/a to 60/i, in diameter, situated 266/x to 

 298/x caudad of oral sucker. Ovary elongate, 580;u, to 700/x long by 

 135ju, to 185/Li wide, situated at equator, or caudad of equator of body. 

 Uterus long and containing numerous eggs. Genital pore immedi- 

 ately caudad of acetabulum. Vitellaria occupy the space from the 

 cecal union to the posterior end of the body, and are composed of 

 transversely elongated follicles lying on both sides of the common 

 cecum. Egg oval, 74/* to 106/a long by 60/x to 80ju, wide, provided with 

 a small, lateral, hooked or rudimentary sj)ine. 



Cer carta furcocercous, apharyngeal, spinose. Body 100/a to 160]u, 

 long by 40/A to 66/x wide; tail stem 140/li to 160/* long by 20/* to 35ju, 

 wide ; f ureal rami 50/* to 75/* long. Oral sucker 54/* long by 33/t wide ; 

 acetabulum small. Penetration glands consist of five pairs of large 

 nucleated cells with granular, acidophilic cytoplasm; penetration 

 gland ducts very thick, opening at anterior end of oral sucker and 

 capped by five pairs of hollow piercing spines. The germ cells con- 

 sist of a clustered mass immediately caudad of the acetabulum. The 

 excretory system pattern consists of three pairs of flame cells in the 

 body and one pair in the tail stem. 



Hosts. — Primary, man. Bos sinicus,- cattle {Bos taurtos). dog, cat, 

 horse, swine, sheep, and experimentally, guinea pigs, monkeys, rab- 

 bits, rats, and mice; secondary, snails {KatayanKi nosophora and 

 K. n. yoshidai in Japan; K. formosana in Formosa; Oncomelania 

 {Hemibia) hupensis, Katayama fausti and K. f. cantoni in China). 



Location. — Portal and mesenteric veins. 



Distribution. — Asia (China, Japan, Formosa, and Philippine 

 Islands) and Africa. 



SCHISTOSOMA BOVIS (Sonsino, 1876) R. Blanchard. 1895 

 Figures 23-25 



Synonyms. — Bilharsia bovis Sonsino, 1876, pp. 84-87 (in Bos 

 taurus; Egypt); Bilharzia crassa Sonsino, 1878, p. 652; Bilharzia 

 ovis Cobbold, 1885, p. 499; Gynaecophorus o-assus (Sonsino, 1878) 

 Stossich, 1892, p. 6; Gynaecophorus bovis (Sonsino, 1876) Railliet, 

 1893, p. 375; Bilharzia haemutobia crassa (Sonsino, 1878) Kowa- 

 lewski, 1895, pp. 18, 19, 27; Schistosoma crassmm (Sonsino, 1876) 

 Looss, 1899, pp. 657, 658. 



SpecifiG diagnosis. — Schistoso77m : 



Male 9 to 14 mm. long. Cuticle with tubercles and spines. Oral 

 sucker subterminal, 230/t long and 150/* deep; acetabulum 420/* in 



- Bi-umpt (Precis de Parasitologic, ed. 3 (1922), p. 398) gives Bos sinicus as a host for 

 Schistosoma japonicum. This host name is not recognized by mammalogists, and since 

 no geographical locality is given, its identity is problematical. 



