6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 73 : art. it 



developed, opening into a small, nonmuseular genital sinus; genital 

 ducts open into genital sinus at base of two papilliform gonotyls; 

 genital pore cephalad of acetabulum. Seminal vesicle well developed, 

 C or S shaped, dorsal to uterine coils. Testes ovoid or globular, 

 situated near posterior end of body, the right testis usually behind 

 left. Ovary ovoid or globular, situated to right of median line 

 cephalad of seminal receptacle. Vitellaria fill post -testicular space 

 and extend usually to acetabulum or beyond. Uterus as in Cryp- 

 tocotyle. 



Type species. — Apophallits muhlingl (Jagerskiold, 1899) Liihe, 

 1909. 



KEY TO SPECIES OF APOI'HAIXXJS 



1. Body elongated, with more or less distinct constriction between 



acetabulum and bifurcation of intestine 2 



Body ovoid or elongated piriform in sliape 3 



2. Vitellaria extend to level of acetabulum ; intestinal bifurcation 



about one-third of body length from anterior end miihlingi 



Vitellaria do not extend anteriorly as far as acetabulum ; intes- 

 tinal bifurcation about one-fifth of body length from anterior 

 end crami 



3. Body ovoid in shai3e ; vitellaria extend to level of intestinal bifur- 



cation or slightly beyond donicum 



Body elongated piriform in shape; vitellaria extend only slightly 



beyond acetabulum brevis 



LITERATURE CITED 

 Africa, C. M. 



1929. On two German Heterophyidae with notes on the variability of 

 certain structures. Centralb. f. Bakteriol., Abt. 1, vol. 114, nos. 

 1-2, Orig., pp. 81-86, figs. 1-4, Sept. 28 ; German summary, p. 86. 

 Ransom, B. H. 



1920. Synopsis of the trematode family Heterophyidae with descriptions 

 of a new genus and five new species. Proc. U. S. Nat. Mus.. vol. 

 57, no. 2822, pp. 527-573, figs. 1-33. 



WiTENBEKG, G. 



1929. Studies on the trematode-family Heterophyidae. Ann. Trop. Med. 



and Parasit., vol. 23, no. 2, pp. 131-239, figs. 1-33. 



1930. Corrections to my paper " Studies on the trematode family Hetero- 



phyidae." Ann. and Mag. Nat. Hist., ser. 10, vol. 5, pp. 412^14, 

 April. 



U. S. GOVERNMENT PRINTING OFFICE; 1931 



