Ou Cephalogoniraus vesicaudus ii. sp. 251 



C. lenoiri and C. americanus are described as having esophagi 

 respectively 150 f-i and 125 f.i in length. 



The reproductive sj^stems agree very closely with those described 

 by Staffoed for C. americanus. The relations and positions of tlie 

 Organs are shown in Fig. 1. The testes occupy the central portion 

 of the body back of the acetabulum and are elongated transversely, 

 the ratio of the transverse to the longitudinal diameter being about 

 3:2. The posterior testis is median in position, the anterior one 

 lying wholly to the left of the middle line. The penis sack with 

 its Contents, seminal vesicle and prostate gland begins as a large 

 fiisiform structure just in front of the ovary upon the right side 

 and extends obliquely across the body between acetabulum and 

 Pharynx; after crossing the left coecum it diminishes in size and 

 as the ductus ejaculatorius (Looss) or prostatic duct (Poiriek) 

 continues forward as a slender tube having a somewhat tortuous 

 course over the oral sucker or along its left margin in Company 

 with the Vagina to the genital sinus. The seminal vesicle is 

 elongated and folds upon itself to occupy nearly the first half of the 

 fusiform enlargement of the penis sack, the remaining portion being 

 taken up by the enormously developed prostate gland. The ovary 

 is placed opposite the posterior border of the acetabulum and always 

 upon the right side. The receptaculum seminis is large and at the 

 right end of the anterior testis. The shell gland surrounding the 

 ootype lies just in front of the mesial end of the anterior testis 

 between it and the acetabulum. Laueer's canal opens dorsally in 

 the middle line between anterior testis and the receptaculum seminis 

 (Fig. 1 u. 2 L. c). 



The Uterus extends from the ootype backward on the right 

 side and its egg-filled coils occupy most of the space back of the 

 posterior testis. Its terminal portion passes forward on the left 

 side near the intestinal coecum and terminal part of the penis sack 

 to the genital sinus. 



The vitellaria are placed along either side mostly lateral to 

 the intestinal coeca but overlapping tliem in the middle region. They 

 extend forward to a transverse line halfway between the oral sucker 

 and the acetabulum. Posteriorly they reach a little beyond the 

 posterior border of the posterior testis. Poirier describes the testes 

 in C. lenoiri as being one behind the other in the median line 

 whereas in both of the American species the line joining the testes 

 is an oblique line and the anterior testis is placed on that side of 



