ART. 



A NEW N'EMATODE FROM THE KINGFISHER WEHR 3 



the tip of the head, and -il/x posterior to the termination of the 

 cephalic vesicle. The cordons extend posteriorly from the base of 

 the lips for a distance of 27/x. The inner edges of the cordons are 

 toothed or serrated. Mouth with two conical, projecting lips, each 

 bearing a pair of submedian cephalic papillae. The caudal extremity 

 is tightly coiled in the preserved specimens, and it was impossible to 

 secure a satisfactory view of either the dorsal or ventral surface. 

 Caudal alae are present and these alae bear 8 pairs of papillae. 5 

 of which are postanal and 3 preanal. Four of the 5 pairs of postanal 

 papillae are apparently pedunculated, whereas the most posterior 

 pair, situated near the tip of the posterior end, is sessile. The 

 spicules are unequal and dissimilar. The right spicule is short and 

 thick, consisting of a strongly chitinized part which is rounded at 

 the distal end, and a hyaline portion extending beyond this which 

 has a groove cut out of its free end, this portion resembling some- 

 what a bird's beak ; the spicule is 143/;. long and 34ja wide. The left 

 spicule is nearly three times as long as the right, and more slender, 

 being 408/u, long and 17ijl wide, and has a rounded distal end. 



Female. — IT to 18 mm. long by 150/x wide. The head at its widest 

 point is 61/u, wide. The cephalic vesicle terminates 136/x from the 

 tip of the anterior extremity; the cervical papillae are ITOju, from the 

 anterior extremity. The cordons are triangular in shape as in the 

 male, and extend 30/x from the base of the lips. The pharynx is 

 175 to 214:/x long by 8.5/* wide ; the anterior esophagus about 610/a to 

 650|U, long, and the posterior esophagus 1.5 to 2.1 mm. long by 51/i, 

 wide. The slightlj^ depressed vulva is situated in the posterior part 

 of the body near the anal opening, the distance between the tvfo 

 orifices being 476/x. From the vulva the ovejector courses in a 

 posterior direction for a distance of 360/*, then turns anteriad to 

 join the uterus. The anal opening lies 82/i, anterior to the tip of the 

 posterior extremity of the body. The embryonated eggs measure 

 31/x by 20/1. 



Host. — Northwestern belted kingfisher [Ceryle aJcyon caurina). 



Location. — Gizzard. 



Distribution. — Montana (Miles City), United States. 



Type specimen.— U.S.^.M. No. 29848. 



KEY TO THE GENERA OF ACUARIINAE 



1. Ornamentation of the anterior end in the form of cordons extending pos- 



teriorly from the liead along the cervical region, usually in the sub- 

 median fields (Acuaria, s. 1.) 2 



Ornamentation of a nature different from the above, or cordons, in either 

 case confined to cephalic region 8 



2. Cordons not recurrent, not anastomosing 3 



Cordons recurrent or anastomosing, or both 4 



