NO. 14 MANTER: DIGENETIC TREMATODES OF FISHES 395 



both specimens, but accuracy in counting cannot be certain along the 

 sides where the spines overlap several times) ; largest spines about 0.027 

 by 0.012; smallest spines about 0.017 by 0.007. Body spination extending 

 to posterior end but denser anteriorly. Prepharynx not much longer than 

 pharynx (shorter when forebody contracted) ; pharynx 0.195 to 0.228 

 long by 0.180 to 0.187 wide; distinctly pyriform; esophagus short; ceca 

 obviously opening into excretory vesicle. Genital pore median close in 

 front of acetabulum. Testes rounded, tandem, in posterior 5^ to ^ of 

 body ; not markedly longer than wide, largely intercecal but partly over- 

 lapping the ceca ventrally; separated by a short distance which is not 

 occupied by vitellaria except dorsally ; cirrus sac sinuous, very long, reach- 

 ing more than halfway between acetabulum and ovaiy, cirrus very long, 

 reaching almost halfway to ovary; seminal vesicle in basal fourth or fifth 

 of sac; genital atrium tubular, opposite anterior half of acetabulum. 

 Ovary globular to subtriangular, not elongated, separated from an- 

 terior testis by a short space not occupied by vitellaria; vitellaria from 

 posterior fourth or posterior edge of acetabulum to posterior end of body; 

 continuous ; not covering uterus ; dorsal, ventral, and lateral to ceca but 

 not entering between gonads except dorsally; eggs 68 to 82 by 38 to 44 /a, 

 usually about 71 to 73 by 41 to 42 ju,; metraterm narrow, sinuous, almost 

 as long as cirrus sac, and extending more than halfway to the ovary. 



The name multispinosum refers to the large number of oral spines. 



Comparisons. No other species of Stephanostomum has nearly so 

 many oral spines as S. multispinosum with the exception of S. micro- 

 stephanum and S. tristephanum, both of which have 3 rows instead of 2. 

 The oral spines, furthermore, are smaller than in other species. 



Stephanostomum hispidum (Yamaguti, 1934) n. comb. 



(Plate42,figs. 79, 80) 



Synonym: Echinostephanus hispidus Yamaguti, 1934 



Hosts and Localities : Seriola dorsalis (Gill) at Tangola Tan- 



gola, Mexico, and Secas Islands, Panama 

 Seriola species (not dorsalis) at White 

 Friars, Mexico 



Elagatis bipinnulatus (Quoy and Gai- 

 mard) at Bahia Honda, Panama 



Location: Intestine 



Number: 4 from S. dorsalis; 6 from S. species; 4 from E. 

 bipinnulatus 



