ART. 4 NEW HELMINTH PAHASITES PRICE 5 



Professor Eailliet, shows that a coarse striation of the anterior end 

 of the body is present but the cuticular inflation is not marked. 



TREMATODA 



Family DICROCOELIIDAE 



CONTRORCHIS, new genus 



Generic diagnosis. — Dicrocoeliinae : Body oval in outline and with 

 greatest width at the middle of the body. Oral sucker strongly 

 muscular and directed anteriorly. Pharynx well developed; pre- 

 pharynx absent. Esophagus short; intestinal ceca slender and ex- 

 tending to the posterior third of the body. Acetabulum large, situ- 

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

 Vitellaria compact, extra cecal, and not extending anteriorly beyond 

 the posterior border of the posterior testis. Ovary oval in shape and 

 situated immediately posterior to the posterior testis. Uterus with 

 one ascending and one descending limb, each with numerous trans- 

 verse coils, extending to the posterior end of the body. Testes oval, 

 one lying anterior and the other posterior to the acetabulum. Genital 

 orifice immediately behind the intestinal bifurcation. Excretory pore 

 terminal. 



Type species. — Gontrorchis hiliophilus, new species. 



CONTRORCHIS BILIOPHILUS, new species 



Specific diagnosis. — Gontrorchis: Length 2.5 to 3 mm.; width 0.85 

 to 1,1 mm. In preserved specimens the anterior end is slightly 

 curved ventrally. The anterior third of the body is covered with 

 small scalelike spines. The oral sucker is strongly muscular, 200jw to 

 213ju, long by 148/t to 184/* wide, and with the oral aperture terminal. 

 The pharynx is situated immediately behind the oral sucker and 

 measures 84/i to 99ju, long by 71/t to 84/* wide. The esophagus is short, 

 67/i to 71/Li in length, and bifurcates a short distance in front of the 

 anterior testis to form simple, slender, intestinal ceca which extend 

 to the posterior third of the body. The acetabulum is circular, 

 strongly muscular, 183/i to 355/t in diameter, and situated in the 

 median line about 500/i from the anterior end of the body. The 

 testes are ovoid, elongated transversely; the anterior testis is situ- 

 ated anterior to the acetabulum and measures 140/j, to 210/x by 280/u, to 

 430/A ; the posterior testis is situated posterior to the acetabulum and 

 measures 140/* to 210yu, by 350/* to 430/x. The cirrus pouch is pyrif orm, 

 142/1 to 227/1 long and 65/* to 100/* wide, and contains a relatively large 

 vesicula seminalis, a small prostate, and a short ejaculatory duct. 

 The genital orifice is situated immediately behind the intestinal 



