STUDIES OX THE ECTOPARISITIC TREMATODES OF JArAX. ^97 



dorsal, median or a lateral vaginal opening. With a pair 

 of egg-shaped or spherical suckers in the mouth-cavity. 



1. Axinc hctcrocerca, n. sp. 



(PI. Yir, figs. 1, 2, 3, 4 ; PI. VIII.) 



Boilij flat, about 10 mm. long, with a form roughly like that 

 of the blade of a Turkish sword, with a convex border behind. 

 Common (jenital openimj situated a little behind the termination of the 

 03sophagus. Ocarij at the posterior end of the middle third of the 

 body, comparatively small, long, following in its general course the 

 three sides of a triangle, the apex of which is directed towards the 

 front end of the bod}^, and making numerous smaller windings; its 

 exact form is as represented in fig. 1, PL VII, and fig. 5, PI. A III. 

 Ocidiict arisiriix from the ovarv on the v\<A\t side of the bodv, and bear- 



O I/O */ ' 



ing a small seminal receptacle close to its origin, proceeds backwards and 

 towards the left, and is continued into the ootyp in the median line ot 

 the body. The uterus proceeds from the ootyp straight forwards and 

 opens into the genital atrium, ^'atjinal opening single, dorsal, median, 

 situated as far behind the common genital opening as this is behind 

 the pharynx. The vaginal canals are paired from the beginning, and 

 proceeding backwards on the inner side of the intestinal trunk are 

 continued into the paired yolk-ducts at the point marked with * in 

 ill!'. 1, PI. YII. With a second dorsal onenins; behind the va^-inid 

 opening, which ends blindly. The ritellaria of the two sides are whol- 

 ly separate in front; but their boundary behind can not be dis- 

 tinofuished ; extendinsf from the level of the vaginal o])enin^' to near 

 the posterior extremity of the body. Pairal i/olk-ducts arising from 

 the vitellarium on each side at the level marked with * in fig. 1, PI. N II, 

 and proceeding backwards as the direct continuations of the vaginal 

 canals, unite with each other in the median line of the body, on the 



