HELMINTH PARASITES OF BIRDS — DENTON AND BYRD 183 



The differences noted, except possibly the difference in the size of the 

 cirrus pouch, can be attributed to a difference in the state of body con- 

 tractions. Since this is the first time A. heterolecithodes has been re- 

 ported from the New World, a detailed description of the specimen 

 is given below. 



Descnption.— Body slender and semitransparent, approximately 

 11.4 mm. long by 0.69 mm. wide at level of acetabulum ; sides almost 

 parallel. Cuticle thin, without spines. Oral suckers subterminal, 

 0.44 mm. long by 0.43 mm. wide. Acetabulum smaller, 0.36 mm. in 

 diameter, situated about one-seventh of body length from anterior 

 end. Pharynx 0.10 mm. in diameter. Esophagus narrow and 

 straight, 0.39 mm. long, bifurcating about two- fifths the distance 

 from oral sucker to acetabulum. Ceca slender, unequal in length, ex- 

 tending to about level of caudal extremity of vitellarium. Excretory 

 pore terminal. Genital pore median, a short distance posterior to 

 intestinal bifurcation. Anterior testis 0.51 mm. long by 0.26 mm. 

 wide, irregular in outline, deeply fissured on lateral margins, situated 

 toward same side of body as vitellarium. Posterior testis 0.52 mm. 

 long by 0.26 mm. wide, of same shape as anterior testis, situated on 

 opposite side of body, 0.87 mm. behind level of anterior testis. Cirrus 

 sac pear-shaped, 0.24 mm. long by 0.14 mm. wide, containing coiled 

 seminal vesicle and eversible cirrus. Ovary small, 0.16 mm. long by 

 0.27 mm. wide, deeply lobed, situated preequatorily on opposite side of 

 body from vitellarium. Seminal receptacle large, globular, just pos- 

 terior to ovary. Melilis' gland at posteromedial margin of seminal 

 receptacle. Vitellarium unilateral, consisting of numerous small fol- 

 licles, divided into one large and two small groups, extending from 

 level of Mehlis' gland through a distance of 3.43 mm. on right side 

 of body. Uterus with many coils, descending first to posterior end 

 of body, then ascending, passing to right of ovary and posterior testis, 

 to left of anterior testis and dorsal to acetabulum and cirrus sac to 

 genital pore. Mature ova dark brown, 33/* to 38/. long by 23/* to 25/* 



wide. 

 Additional host.—Gallinula chloropus cachinnans Bangs. 



Eahitat. — ^Liver. 



Locality. — Tennessee : Reelf oot Lake. 



Material— The specimen has been deposited in the United States 

 National Museum, Helm. Coll. No. 36732. 



Genus LUBENS Travassos, 1920 



LUBENS LUBENS (Braun, 1901) 



Figure 38, e, f 



Dicrocoelium lulens Bratjn, Centralbl. Bakt. Parasit., vol. 20, p. 945, 1901. 

 Euritrema (Luhem) lubens Teavassos, Arch. Esc. Sup. Agr. e Med. Vet. Nicthe- 

 roy, vol. 3 (1919), pp. 19-20, 1920. 



