NO. 14 MANTER : DIGENETIC TREMATODES OF FISHES 355 



Pseudolepidapedon balistis, new species 



(Plate 35, fig. 27) 



Host: Balistes verres (Gilbert and Starks) 

 Location : Intestine 

 Locality: James Island, Galapagos 

 Number : 2 specimens in one host 



Yamaguti named the genus Pseudolepidapedon for a lepocreadid-like 

 trematode, P. paralichthydis^ from an unnamed Japanese fish. He in- 

 cluded in it the Lepodora sp. of Kobayashi (1921), which he named 

 Pseudolepidapedon kobayashii. Yamaguti distinguished the genus from 

 Lepidapedon by its median genital pore, absence of a seminal receptacle, 

 and the structure of the terminal genitalia. Absence of an external seminal 

 vesicle and a modified anterior portion of the phaiynx are other im- 

 portant differences from Lepidapedon, 



The following species is placed in the genus Pseudolepidapedon, even 

 although it seems to have a seminal receptacle, because it has a median 

 genital pore, lacks an external seminal vesicle, has a similar phaiynx and 

 similar terminal genital ducts. An interesting character is the presence 

 of what seem to be lymphatic vessels, here associated again with a modi- 

 fied pharynx as in Apocreadium, Megasolena, Hapladena, and other 

 genera. The affinities of the genus are probably Lepocreadid, but there is 

 considerable resemblance to Acanthopsolus Odhner. 



SPECIFIC DIAGNOSIS OF PSEUDOLEPIDAPEDON BALISTIS 

 Body completely spined ; with eye spots. Length 1.957 to 2.794; 

 width 0.945 to 1.093; greatest width near posterior end; posterior end 

 broadly rounded, anterior end more tapering; forebody 0.712 to 1.161 

 (extended) ; oral sucker 0.275 to 0.307 ; acetabulum 0.300 to 0.360 (only 

 slightly larger than oral sucker) ; prepharynx 0.142 to 0.315; pharynx 

 pyriform, anterior third modified with circular muscles forming a pre- 

 pharyngeal ring; pharynx 0.232 to 0.277 long by 0.225 to 0.262 wide; 

 esophagus very short; ceca wide, diverging laterally, then extending to 

 near posterior end of body. 



Genital pore median, immediately anterior to acetabulum. Testes 

 ovoid, smooth or with slightly irregular contour, longest in a diagonal 

 direction, subtandem or slightly diagonal, close together, intercecal, in 

 posterior half of body. Posttesticular space 0.285 to 0.465. Cirrus sac 

 elongate, more or less divided by a narrowed region into a fairly wide 

 anterior portion lying along the left anterior border of acetabulum and 



