462 



On a new A scar id from an Otter, 



The caudal end of the male (fig. 3) is curled ventrally. 

 The tail measures 0"22-0'25 mm. in length. The cuticle at 

 the sides of the body near the tail is somewhat inflated and 

 is longitudinally ribbed between the rather coarse transverse 

 striations. There are two short equal spicules, measuring 

 0*55 mm. in length and very slender, their thickness not 

 exceeding 0*017 mm. except at the roots. There are nine 

 pairs of postanal papillae, of whicli one pair, near the extre- 

 mity of the tail, is laterally placed, the rest subventrally. 



Fig. 3. 



Cheoascaris spinicoUis. Caudal end of male ; ventral view. 



AH these papillae are small, except those of the fourth pair 

 from the posterior end, which have double terminations. 

 The preanal papillae are very numerous, as many as seventy- 

 seven having been counted on one side of the body. Poste- 

 riorly they are large, especially those of the third to the 

 eighth pairs of the series, which have long peduncles, 

 somewhat swollen at their bases. Further forward the 

 papillae gradually become smaller, the most anterior being 

 quite minute. 



The tail of the female is conical and measures about 



