NO. 14 MANTER : DIGENETIC TREMATODES OF FISHES 429 



The name magnaporum refers to the large, conspicuous genital pore. 



Comparisons. Although the same size as Lecithochiriurn microstomiim 

 with which it frequently occurs, L. magnaporum can be identified by its 

 large genital pore, very large sinus sac, and smaller eggs with pointed 

 ends. The ventral sucker is slightly smaller and the prostatic vesicle is 

 not bipartite. It differs from L. exodicum in longer vitelline lobes and 

 smaller body size. It differs from L. japonicum in genital pore, size and 

 shape of the sinus sac, absence of external prostatic vesicle, and much 

 smaller ventral sucker. 



Lecithochiriurn muraenae, new species 

 (Plate48, figs. 117, 118) 



Host: Muraena clepsydra Gilbert 



Location: Stomach 



Locality: Cape Elena, Ecuador 



Number: 2 specimens of this moray were examined. Several 

 specimens of what seemed to be the same hemiurid 

 occurred in each host. The parasites were placed in 

 the same vial. Upon study 3 specimens proved to be 

 L. muraenae, the others Sterrhurus fusiformis. The 

 2 species of parasites probably can occur together in 

 this host. 



SPECIFIC DIAGNOSIS OF LECITHOCHIRIUM MURAENAE 



Body rather thick and robust, 3.684 to 5.359 in length by 0.958 to 

 1.120 in greatest width (near middle). Ecsoma glandular, much folded, 

 retracted in eveiy specimen, much as in Sterrhurus fusiformis. Oral 

 sucker subterminal, surmounted by fleshy lip, somewhat wider than long, 

 0.300 to 0.375 in transverse diameter; acetabulum large, circular, 0.715 

 to 0.883 in diameter; sucker ratio approximately 3:7. Forebody 0.756 

 to 1.188. Presomatic pit about midway between suckers, suckerlike, 0.225 

 to 0.255 in diameter, with radial and circular muscles, nonglandular, 

 with small irregularly shaped pore. Genital pore median, a short distance 

 anterior to presomatic pit. Pharynx 0.120 to 0.170 in length by 0.075 to 

 0.120 in width; esophagus apparently lacking; ceca slightly sinuous, ex- 

 tending to level of base of ecsoma but not entering ecsoma. Testes oblique 

 (almost symmetrical), immediately posterior to acetabulum, separated 

 by uterus. Seminal vesicle thin walled, not distinctly divided into 3 parts, 

 making 3 more or less distinct loops before straightening to enter sinus 

 sac, thus being approximately S shaped; posterior end of seminal vesicle 



