. Bulletin - United States National Museum. Science. NEMATODE PARASITES OF BIRDS 329 of its length and 24 to 30/* wide at the base; short spicule 180 to 240/* long by 27 to 42/* wide. Female to 20 mm. long by 270 to 390/* wide. Anus 390 to 440/* from tip of tail (fig. 394). Vulva 780/* to mm. from tip of tail. Vagina mm. long (judging from the figures this in- cludes more than the vagina) ; it is dilated at a point 660/* from the vulva to form a thin-walled portion holding about 10 eggs in transverse rows; not more than 1 egg at any point in terminal portion. Eggs 33 to 45/* by
. Bulletin - United States National Museum. Science. NEMATODE PARASITES OF BIRDS 329 of its length and 24 to 30/* wide at the base; short spicule 180 to 240/* long by 27 to 42/* wide. Female to 20 mm. long by 270 to 390/* wide. Anus 390 to 440/* from tip of tail (fig. 394). Vulva 780/* to mm. from tip of tail. Vagina mm. long (judging from the figures this in- cludes more than the vagina) ; it is dilated at a point 660/* from the vulva to form a thin-walled portion holding about 10 eggs in transverse rows; not more than 1 egg at any point in terminal portion. Eggs 33 to 45/* by 25 to 30/*, rather square-ended, con- taining embryos when oviposited. Life history.—Unknown. See remarks on O. mamoni, p. Figs. 392-393.—392, Oxyspirura ophthalmica. a, Head; b, male tail. After Linstow, 1903. 393, Oxyspirura paevovum. a. Head; b, male tail. After Sweet, 1910 Distribution.—Australia. The worms reported by Smit from the Dutch Indies have egg measurements in agreement with this species, 40/i by 20/*; he calls them O. mansoni, but they differ in some re- spects from both O. marisoni and O. parvovum. OXYSPIRURA SIAMENSIS (Linstow. 1903) Ransom, 1904 Synonym.—(Jheilospirura siamensis Linstow, 1903*7. Hosts.—Primary: Gentropus siamensis {=Centropus sinensis)', secondary: Unknown. Location.—Probably the eye, according to Linstow. Morphology.—Oxysjrirura (p. 321) : Cuticula with fine transverse striations. Buccal cavity small. Male mm. long by 260/* wide. Esophagus 1/11, tail 1/34, of body length, the tail (fig. 395) curved ventrally. About 28 pairs of preanal papillae, becoming gradually smaller anteriorly. Spicules unequal, 470/* and 250/* long. Female mm. long by 460/* wide. Esophagus 1/13, tail 1/37, of body length. Vulva 620/* from tail end, situated a short distance anterior to anus. Vagina directed anteriorly, 260it long, dividing into 2 Please note that these images are extracted from scanned page images that may have been d
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