A NEW NEMATODE FROM THE COYOTE— HALL. 



79 



situated near the tip of the tail. Of pre-anal papillse there are three 

 pairs that show a true papUlar structure. These are large conoidal 

 affairs. A pair of somewhat similar cuticular elevations is situated 

 anterior of these and nearer the ventral line, just back of the last 

 ventral fan, but no papillar structure is evident here. The sUghtly 

 curved, light-colored spicules are equal, 207 // long and 9 or 10 /( wide. 

 The width of the cuticular annulations is from 5 to 7 /« over most 

 of the body. The mouth has the structure characteristic of the 

 genus: The buccal capsule is bounded on its antero-ventral surface 

 by a lip which overhangs the buccal aperture somewhat; this lip 

 seems to be supported by two chitinous trabeculse; around the buccal 

 aperture is a row of denticles, not easUy counted, but apparently 

 between 15 and 20 in number; at the base of the buccal capsule just 



-RiCTULAEIA SPLENDIDA. ANTEEIOR END OF FEMALE SHOWING VULVA. 



dorsal of the esophageal aperture is a tooth about 11 /x long, curved 

 dorsally at its tip. (Other details of the capsular armature not 

 determined for male. See description of female.) The head 

 papillae, while doubtless present, are not evident in the male. The 

 anterior end of the first latero-ventral comb is about 30 pt back of the 

 base of the buccal capsule. 



Female. — Length, 8.37 to 10.55 mm.; maximum diameter, 440 ;«. 

 Dorso-ventral head diameter at base of the buccal capsule, 80 //. 

 Length of esophagus, 2.53 to 2.91 mm. Distance of nerve ring from 

 anterior end of body, 312 ji. Vulva just posterior of the posterior end 

 of the esophagus, 2.33 to 2.49 mm. back of the anterior end of body, 

 and opposite the fifty-fifth comb. (See fig. 3.) Vulva may be 

 situated to right or left of the median ventral line. The transition 



