46 



ten years of age and a resident of the Gardens for 

 nine years, dead from acute peritonitis following puncture 

 of the intestinal wall by a spicule of bone, 36 specimens 

 (Path. Hist., 1102), of which 23 were females and 12 

 males, with one badly damaged example undetermined, 

 were obtained from the stomach and intestines. In addi- 

 tion to these a single male specimen (Path. Hist., 1148) 

 was subsequently submitted, having been passed in the 

 dejecta of a lion now living in the collection. On examina- 

 tion it was found to present precise identity with the first 

 examples. The following notes of description were made 

 from the study of the specimens from the first animal : There 

 is considerable variation in size from age and state of develop- 

 ment. The largest female measures 76 mm. in length; the 

 largest male 62 mm. Worms cylindrical in section, with 

 thickest level near middle of body length; and taper delicately 

 anteriorly and posteriorly. Preserved specimens colorless 

 (but with a reddish tinge in some, especially toward the 

 posterior extremity, suggesting that in life they were of 

 reddish hue), rigid. In both sexes the head end is inflexed. 

 Cuticle finely striated transversely, expanded at head end 

 into a semilanceolate alar extension (Fig. 2, a), beginning 

 anteriorly close to base of lips and in the larger specimens 

 extending posteriorly 3 mm., its widest portion at about its 

 posterior fourth, where it attains a width of nearly 0.3 mm., its 

 free border from this level to its coalescence with the body 

 cuticle becoming thick and somewhat rounded (not as large 

 or as cordate in outline as the wings of Ascaris cam's, and not 

 crenulate). Mouth terminal, provided with three nearly 

 equal lips, the dorsal lip a little wider than the others (base 

 of dorsal lip, 0.16 mm. transversely; of inferior lips, 0.13 mm). 

 Diameter of face of cephalic end, 0.25 mm. Each lip bears 

 two papillae on external surface. Dorsal lip broader than 

 long (0.12 mm. from base to anterior border; base, 0.16 mm. 

 transversely); anterior border convex and poorly defined 

 from lateral borders, which are also convex. Poorly marked 



