NEMATODE PARASITES OF BIRDS 



103 



PSEUDASPIDODERA PAVONIS Baylis and Daubney, 1922 



Hoxts. — Pavo cristatus and Pavo muticus. 



Location. — Not given; presumably ceca. 



Morphology. — Pseuddspidodera (p. 102) : Small worms. Head 

 (fig. 145) with cordons as described in generic diagnosis. Diameter 

 of head at posterior limit of cordons, about 100/*. Narrow lateral 

 alae extend from a little anterior to nerve ring almost to tail. 

 Esophagus divided into short anterior portion and a long posterior 

 portion ending in a pyriform bulb; there appears to be some kind 

 of valvular apparatus at the union of the 2 portions; bulb 250 to 

 260/* long by 170 to 190/x wide and containing the usual valves. 

 Nerve ring 400 to 460/x from head end. Excretory pore GOO to G50/* 

 from head end. 



Male G mm. long by 250/* wide. Esophagus 1.4 to 1.48 mm. long. 



0-5 mm. 



oamm. 



Figs. 1 15 147. — Pseudaspidodera pavonis. 145, Head, lateral view. 146, Male 

 tail. i. kit. latebal view ; right, ventral view. 147, vulva and vagina in 

 lateral view, showing cement plug in vulva. arrow points in direction op 

 head. After Baylis and Daubnbt, 1922 



Tail (fig. 14G) 380 to 430/* long, less than half of it provided in 

 anterior portion with wide alar expansions containing some caudal 

 papillae; posterior part of tail simple, slender, and finely pointed. 

 Circular preanal sucker, 120 to 130/* in diameter, with well developed 

 chitinous wall, 150 to 170ft anterior to cloaca] aperture; the 

 greatest diameter (antero-posterior) of sucker aperture is 70/*. 

 Spicules unequal and dissimilar. Right spicule slender and simple. 

 780/t long; left provided with broad alae and a barbed tip. and 450/; 

 long. No accessory piece. Caudal papillae, 12 pairs: of these 3 

 pairs just anterior to filamentous portion of tail, the middle pair the 



