406 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



tati Yamaguti, 1938 and P. siremboni Yamaguti, 1938 in several respects, 

 notably : the posterior group of vitellaria, the anterior group of vitellaria 

 not reaching anterior to the acetabulum, the longer ceca, shorter esopha- 

 gus, and wider eggs. The testes are more posterior and less elongate. 



Telolecithus tropicus, new species 

 (Plate44, figs. 92-94) 



Host: Selar crumenophthabnus (Bloch) 



Location : Intestine 



Locality: Bahia Honda, Panama 



Number : 2 specimens in one of 2 hosts examined 



SPECIFIC DIAGNOSIS OF TELOLECITHUS TROPICUS 



Body flat, elongate, more or less tapering at each end, forebody thick- 

 ly spined but spines soon disappear posterior to acetabulum. Type speci- 

 men 1.074 long, 0.217 wide. Suckers weakly muscular; oral sucker 

 slightly wider than long, not funnel shaped, 0.060 in transverse diameter; 

 acetabulum 0.060 to 0.065 in diameter or about equal to oral sucker; 

 forebody 0.375 in length. 



Very short prepharynx, fairly large pharynx, 0.058 long by 0.033 

 wide; very long, narrow esophagus, 0.175 in length or more than 3 times 

 length of pharynx ; ceca inconspicuous, extending almost but not quite to 

 posterior end of body. 



Genital pore a median, transverse slit immediately in front of ace- 

 tabulum. Testis single, large, elongate, slightly irregular in outline, in 

 posterior third of body, extending almost to posterior end of body. Cirrus 

 sac (fig. 93) clavate, bowing around right side of acetabulum, size 0.177 

 (length) by 0.054 (greatest width, near base) ; containing a large ovoid 

 seminal vesicle in its basal third, in its middle third a narrow tube sur- 

 rounded by large transparent cells, in its distal third a spined cirrus ; pro- 

 static cells chiefly around base of cirrus; gland cells also present around 

 seminal vesicle. Genital atrium short but spacious, unspined. Ovary 

 elongated, very irregularly lobed, to the left partly covering left cecum, 

 immediately anterior to testis ; uterine seminal receptacle ; uterus extend- 

 ing posteriorly to overlap testis or (in one specimen) even posterior to 

 the testis, entering base of metraterm, without bulb; metraterm (fig. 93) 

 clavate, almost as large as cirrus sac, bowing around left side of acetabu- 

 lum, its basal portion largely vesicular with a few large spines (iig. 93) 

 and with a central fibrous mass ; anterior third of metraterm with short 



