NO. 14 MANTER : DIGENETIC TREMATODES OF FISHES 407 



triangular spines ; eggs tapering abruptly at one end, more rounded at the 

 other, 24 to 26 by 12 to 15 /x. Vitellaria in the form of indefinite follicles 

 usually more or less fused together, from about the anterior end of the 

 ovary to the tips of the ceca, not quite reaching posterior end of the body 

 and not reaching acetabulum by some distance, largely lateral, partly me- 

 dian, overlapping testis and uterus. Excretory vesicle very short, Y 

 shaped. 



The name tropicus is for the region of collection. 



Comparisons. This trematode is placed in the genus Telolecithus 

 chiefly because of the posterior location of the vitellaria. It bears some re- 

 semblance to Paraproctotrema Yamaguti, 1934 but differs in the location 

 of the vitellaria, in lacking the uterine bulb, in shorter ceca, and in other 

 details. It differs from Telolecithus pugetensis Lloyd and Guberlet, 1932 

 in body shape, length of esophagus, extent of vitellaria, shape of ovary 

 and testis, in the terminal entrance of the uterus into the metraterm, in 

 shape of eggs. It resembles Genolopa trifolifer Nicoll, 1915 in many 

 respects, although the vitellaria extend more posteriorly, the gonads are 

 of different shape, the prepharynx is shorter, and the esophagus is longer. 

 It is probable that the genus Genolopa should be restricted to monorchids 

 with a median cluster of much longer spines in the cirrus sac, a character 

 of G. ampullacea Linton, the type species. Such a view, however, would 

 remove most of the species now contained in the genus. 



Proctoeces magnonis, new species 



(Plate 45, fig. 95) 



Host: Caulolatilus anomalus (Cooper) ? 

 Location: Intestine 



Locality: Cerros Island, Mexico ^ 



Number: One specimen 



SPECIFIC DIAGNOSIS OF PROCTOECES MAGNORUS 



Body smooth, subcylindrical, equally wide along most of its length, 

 posterior end pointed, anterior end blunt. Length 2.862, width 0.412; 

 forebody 0.825 ; posttesticular space 0.640. Oral sucker 0.375 deep, 0.435 

 long; acetabulum on body stalk, 0.322 wide, 0.310 long, with transverse 

 aperture; within its cavity is a longitudinal groove with muscular edges 

 (fig. 95). Prepharynx very short; pharynx large, 0.307 long by 0.217 

 wide; esophagus very short; ceca thin walled, inconspicuous, reaching to 

 near posterior end of body. Genital pore slightly to the left, at base of 



L 1 1- . R ^ R y I 



