NO. 14 MANTER : DIGENETIC TREMATODES OF FISHES 417 



Ovary multilobed, median, chiefly intercecal, immediately pretesticu- 

 lar; seminal receptacle anterior to ovary, posterior to seminal vesicle; 

 Laurer's canal dextral, preovarian; uterus largely filling body posterior 

 to ovary, descending coils to the right, ascending coils to the left, cross- 

 ing to extreme left at testicular level, then across the body anterior to 

 ovary to loop over the right testis, then almost straight to atrium. Vitel- 

 laria of numerous follicles from level of genital pore to midovarian level, 

 largely lateral and ventral to ceca, tending to be more median just ante- 

 rior to ovary. Eggs brown, 19 to 20 by 7 to 9 /x. Colorless glandular 

 masses filling forebody. Excretory vesicle Y shaped. 



The name Siphoderoides indicates relationship to Siphodera. The 

 specific name is in honor of Dr. H. J. Van Cleave. 



GENERIC DIAGNOSIS OF SIPHODEROIDES 



Heterophyinae of fairly large size, elongate vi^ith rounded ends; oral 

 sucker much larger than acetabulum, w^ithout special spines ; acetabulum 

 embedded in body; muscular gonotyl v^^ith aperture present posterior to 

 acetabulum ; testes 2, lateral, extracecal ; seminal vesicle large, saclike, 

 undivided; ovary median, multilobed; vitellaria follicular, anterior to 

 testes. 



Comparisons. The presence of a gonotyl posterior to the acetabulum 

 distinguishes this genus from Siphodera Linton, 1910; Siphoderina Man- 

 ter, 1934; Exorchis Kobayashi, 1921; Pseudexorchis Yamaguti, 1938; 

 Centrovarium Stafford, 1904; and Metadena Linton, 1910. Neochasmus 

 has a gonotyl but also oral spines and a fragmented ovary. 



Hemiuridae Liihe, 1901 



Parahemlurus merus (Linton, 1910) Woolcock, 1935 



(Plate46, fig. 103) 



Hosts: Opisthonema libertate (Gvinther) 



Anchovia arenicola Meek and Hildebrand 

 Location: Stomach 

 Locality: La Plata Island, Ecuador 

 Number : 3 specimens in one host, one specimen in another 



Discussion. Hemiurus merus was named by Linton in 1910 from 

 Clupanodon pseudohispanicus at Tortugas, Florida. He noted the muscu- 

 lar undivided seminal vesicle as distinguishing the species from H. appen- 



