ART. 17 A NEW SPECIES OF TREMATODE PRICE 5 



Genus CRYPTOCOTYLE Liihe, 1899 



Synonyms. — Tocotrema'Looss, 1899; Hallum Wigdor, 1918; Ciure- 

 <ina Skrjabin, 1923. 



Generic diagnosis. — Heterophyidae : Body ovoid to linguiform in 

 shape. Prepharynx very short ; esophagus short ; intestmal bifurca- 

 tion nearer to oral sucker than to acetabulum; intestinal ceca slen- 

 <3er, extending into posterior end of body and terminating caudad 

 of testes. Acetabulum rudimentary, in anterior wall of the spacious, 

 more or less muscular, genital sinus; genital ducts open into sinus 

 at base of a single papilliform gonotyl; genital aperture postace- 

 tabular, in center of genital sinus. Seminal vesicle well developed, 

 -curved in a more or less S-like manner, dorsal to uterine coils. 

 Testes near posterior end of body, irregularly oval or slightly lobed, 

 either side by side or right testis obliquely behind left. Ovary ir- 

 regularly oval or lobed, situated to right of median line and cepha- 

 lad of seminal receptacle. Vitellaria fill postcecal space and extend 

 anteriorly to acetabulum or beyond. Uterus with few loops, con- 

 fined to intercecal space between ovary and genital sinus. 



Type species. — Cryptocotyle concava (Creplin, 1825) Fischoeder, 

 1903. 



KEY TO SPECIES OF CRYPTOCOTYLE 



1. Vitellaria extend to level of intestinal bifurcation or beyond ; 



eggs reniform 2 



Vitellaria do not extend to intestinal bifurcation ; eggs ovoid 3 



2. Vitellaria extend to anterior end of esophagus ; ovary not lobed ; 



genital sinus 60m wide; eggs 38^ by 15|U quinqueangulare 



Vitellaria extend to near level of intestinal bifurcation ; ovary 

 lobed; genital sinus 127^ to 159^ wide; eggs 40ai by 20m. 



cryptocotyloides 



3. Vitellaria extend to level of, or slightly cephalad of, acetabulum 4 



Vitellaria extend about one-half the distance between acetabu- 

 lum and intestinal bifurcation 5 



4. Genital sinus 55m in diameter ; eggs 31m to 36m by 16m to 19m jejuna 



Genital sinus about 2S0m wide ; eggs 52m by 25m echinata 



5. Body usually ovoid in shape, with testes placed side by side; 



eggs 34m to 38m by 16m to 20m concava 



Body usually linguiform in shape, with testes placed obliquely; 



eggs 40m to 50m by 18m to 25m lingua 



Genus APOPHALLUS Luhe, 1909 



Synonyms. — Rossicotrema Skrjabin and Lindtrop, 1919; Coty- 

 lophallus Ransom, 1920. 



GeneHc diagnosis. — Heterophyidae : Body ovoid to very elongated 

 in shape. Prepharynx short; esophagus long; intestinal bifurcation 

 usually nearer to acetabulum than to oral sucker; intestinal ceca 

 slender, terminating as in Cryptocotyle. Acetabulum relatively well 



