328 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



and many islands (Guam, Hawaii, Jamaica, Danish West Indies, 

 Island of Maurice, Dutch Indies, and Samoa). According to John- 

 ston, the worms from Australia are probably O. parvovum (p. 328). 



OXYSPIRURA OPHTHALMICA (Linstow, 1903) Ransom, 1904 



Synonyms. — C heilospirura ophthalmica Linstow, 1903a. 



Hosts. — Primary : Turnix taigoor; secondary : Unknown. 



Location. — Eye. 



Morphology. — Oxyspirura (p. 321) : Cuticula with fine transverse 

 striations. Mouth (fig. 392a) surrounded by 2 lateral and 4 sub- 

 median papillae. Buccal cavity short, widened posteriorly. Lateral 

 fields 42/x wide ; that is, about 1/24 of circumference of body. 



Male 14.4 mm. long by 310/* wide. Esophagus 1/16 of body length. 

 Tail 1/52 of body length finely pointed (fig. 392 b). One pair of 

 postanal papillae and 26 pairs of preanal papillae (Linstow says 1 

 pair of preanal and 26 pairs of postanal, but his figure shows that 

 he confused the two). Spicules unequal, the one 290/* long, the other 

 180/* long. 



Female 21 mm. long by 530/* wide. Esophagus 1/21 of body 

 length. Tail conical, 1/53 of body length. Vulva near posterior end 

 of body, dividing the body length in the ratio of 102 : 5. Vagina 

 anteriorly directed, 400/* long, dividing into 2 uteri. Eggs 39/* by 

 26/*, with thick shells ; cleavage takes place in the uterus. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Asia ( Siam ) . 



OXYSPIRURA PARVOVUM Sweet, 1910 



Hosts. — Primary : Gallus gallus; secondary : Unknown. 



Location. — Under the nictitating membrane. 



Morphology. — Oxyspirura (p. 321) : Very similar to 0. mansoni 

 (p. 325), but the head (fig. 393a.) is without a regular cutinous or 

 chitinous ring with clefts. The 6 cephalic papillae near the mouth 

 are difficult to see and may not be constant in number. Membranous 

 cephalic wings sometimes present in males. The lining of the phar- 

 ynx may project inward and forward at the union of the anterior 

 and posterior portions, and there may be a somewhat similar pro- 

 jection from the wall of the anterior portion. The esophagus is 1.13 

 to 1.3 mm. long. 



Male 9.2 to 14.5 mm. long by 260 to SQQ/* wide. Tail (fig. 393Z>) 

 very sharply curved ventrally. Cloacal aperture 230 to 300/* from 

 tip of tail. Three pairs of preanal and 2 pairs of postanal papillae. 

 The long spicule is 3.4 to 4.1 mm. long, 11 to 13/* wide along most 



