PEARSE FISHES OF LAKE VALENCIA, VENEZUELA 



The genital field, without vitellaria, occupies nearly half 

 the length of the body and the posterior testis is one-fifth the 

 body length from the posterior end. The spherical ovary lies 

 on the right side of the body at the posterior margin of the 

 acetabulurn; diameter about one-fifteenth the length of the 

 body. The lobate testes are about twice the diameter of the 

 ovary. They are usually close together between the intestinal 

 rami, are usually elongated across the body, and one lies anterior 

 to the other. Vitellaria, small, rounded, filling the body 

 posterior to the testes and distributed anteriorly along the 

 sides to points just anterior to the acetabulum. The folds of 

 the uterus are very large. It is coiled on the left, side of the 

 body in the region of the acetabulum, and usually contains a 

 few (0-29; average 5) eggs (.15 mm. long). Cirrus sac elongated, 

 pear shaped, nearly as long as the diameter of the acetabulum. 

 Genital pore anterior to margin of acetabulum and slightly 

 to the right of the median line. 



Host: Mataguaro, Crenicichla geayi, in intestine. 



Type: Cat. No. 7579 (Helm. Coll. U. S. N. M.); collected 

 at Isla del Euro, Lake Valencia, Venezuela, July 9, 1918. 

 Allocreadium chuscoi, new species 



Length, .56 mm., width, .29 mm.; body widest behind 

 middle (Fig. 8). Acetabulum and oral sucker nearly equal in 

 size; ratio of diameter of oral sucker to that of pharynx about 

 11 to 4. Diameter of acetabulum, .084mm. 



A llocreadium chuscoi. 



Genital field, exclusive of vitellaria, occupying the middle 

 half of the body. Ovary somewhat angular, at the right 



