. Bulletin - United States National Museum. Science. NEMATODE PARASITES OF BIRDS 239 Hosts.—Primary : Gallus gallas, Bonasa umbellus, Gaccabis petrosa, Columbia. livia\ Mdeagris gailopavo, Phasia/rms gallus, Numida me- leagris, Quiscalus quiscfula; secondary: .^owbug (Porcellio laevis). Location.—Esophagus, proventriculus, and intestine, fixed in mucosa as adults, and encysted in connective tissue about esophagus, crop, proventriculus and intestine and in the mesentery of primary host; in anterior portion of digestive canal of secondary host. Morphology.—Dhphmynx (p. 237) : No vesicular swelli
. Bulletin - United States National Museum. Science. NEMATODE PARASITES OF BIRDS 239 Hosts.—Primary : Gallus gallas, Bonasa umbellus, Gaccabis petrosa, Columbia. livia\ Mdeagris gailopavo, Phasia/rms gallus, Numida me- leagris, Quiscalus quiscfula; secondary: .^owbug (Porcellio laevis). Location.—Esophagus, proventriculus, and intestine, fixed in mucosa as adults, and encysted in connective tissue about esophagus, crop, proventriculus and intestine and in the mesentery of primary host; in anterior portion of digestive canal of secondary host. Morphology.—Dhphmynx (p. 237) : No vesicular swelling ante- riorly. Four wavy cutaneous cordons (figs. 301, 302, and 303a) on anterior end, originating at the 2 papilliform lips, not anastomosing, but recurrent, the distal extremity of the cordons turning forward and extending anteriorly a short distance. Postcervical papillae small, bicuspid, situated between the recurrent branches of the cor- dons. Body usually rolled in a Fig. 301.—Dispharynx spiralis. Male. After Piana, 1897 Male 7 to mm. long by 230 to 315/x wide (fig. 301). Cordons 415 to 515/i long. Five pairs of postanal and 4 pairs of preanal papillae. Cloacal aperture about 275/* from tail end. Long spicule 400/t long, slender and curved; short spicule 150/* long, navicular. Ventral surface of body in cloacal region and for a certain distance anterior to cloaca covered with small, elongated shields which give the appearance of a longitudinal striation. Female 9 to mm. long by 360 to 565/* wide (fig. 302). Cordons 900/* to mm. long. Anus 120/* from tip of tail. Small mucron on tip of tail. Vulva in posterior portion of body, 2 to mm. from tip of tail. Cylindrical ovejector (fig. 3035) curved, S-shaped at its origin, and then directed anteriorly; the limiting boundary of the vestibule and sphincter is clearly marked by an annular cuti- cular fold; varnish gland (trompc) unpaired, 250/* long. Eggs 36 to 40/t by 21/t, embryonaled when o
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