AUT. 18 THE TKEMATODE FAMILY SCHISTOSOMIDAE PRICE 13 



cophoric canal. Intestinal ceca provided with lateral diverticula 

 and united near posterior end of body. Testes 14 to 18 in number, 

 arranged in two rows at anterior end of gynaecophoric canal. Geni- 

 tal pore median, in front of the anterior testis. Female flattened. 

 Ovary in anterior half of body. Uterus containing numerous oval, 

 spineless eggs. Genital pore caudad of acetabulum. Vitellaria com- 

 posed of lobulated, densely packed follicles extending from the distal 

 pole of ovary to posterior end of body. 



Larva a furcocercous, apharyngeal cercaria, with eye spots, and 

 with an excretory system consisting of six pairs of flame cells, one 

 pair of which is located in the base of the tail stem. 



Tyfe species. — ScMstosomatium pathlocopticwm Tanabe, 1923. 



SCHISTOSOMATIUM PATHLOCOPTICUM Tanabe, 1923 



Figures 30-32 



Synonym. — Schistosotna pathlocopticwm Tanabe in Strong, 1923, 

 p. 516. 



Specific diagnos-is. — Schistosotnati'wm: 



Male 5.6 to 11.8 mm. long by 400/^ to 900/^ wide. Anterior portion 

 of body flattened, 2.4 to 4.7 mm. long by 260jt>i to 580|a wide ; posterior 

 portion, 3.2 to 7.1 mm. long by 1.04 mm. wide when flattened, with 

 edges infolded forming a gynaecophoric canal; between the anterior 

 and posterior portions the body is narrowed and is 240ja to 410/i, 

 wide. Cuticle spiny but without tubercles. Oral sucker subterminal, 

 130/A to 160/i in diameter; acetabulum pedunculated, 250;u, to 260/x in 

 diameter. Esophagus simple, about 520/1, long; intestinal ceca pro- 

 vided with short lateral diverticula and united posteriorly about 600/^ 

 from the caudal extremity; common cecum short and terminating 

 about 140iU, from posterior end of body. Testes 14 to 18 in number, 

 spherical, 100/a to I8O/1 in diameter, in two parallel rows in the 

 median line and slightly pre-equatorial. Seminal vesicle large, semi- 

 lunar in outline, and situated to the left of the median line. Genital 

 pore situated at anterior end of gynaecophoric canal, slightly to left 

 of median line. Excretory system consists of two slender, lateral 

 tubes which unite to form a common tube opening slightly dorsad at 

 the extreme posterior end of body. 



Female 4.5 to 10.2 mm. long by 180/* to BSOju, wide. Suckers weak 

 and rudimentary. Cuticle spiny in anterior part of body, especially 

 around suckers and genital pore. Ovary oval in shape and situated in 

 front of equator of body. Shell gland poorly defined, in front of 

 ovary, and at the junction of the oviduct, vitelline duct, and uterus. 

 Uterus about 500/i, long and filled with eggs. Vitellaria composed 

 of densely packed lobulated follicles, and occupying almost the entire 



