PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 82 



of the lips, while the amphids are on the lateral lips, at a level 

 slightly anterior to the papillae. At least one lateral ala may be 

 present. Cervical papillae just posterior to nerve ring. Male with 

 caudal alae; spicules very long, equal or nearly equal in length, and 

 similar. Caudal extremity pointed in both sexes. Gubernaculum 

 present. 



Type sfecies. — Odontospirura cetiopenis, new species. 



ODONTOSPIRURA CETIOPENIS, new species 



Figures 1-3 



SpecifiG diagnosis. — Odontospirura: Body spirally coiled, some- 

 times in the shape of a corkscrew. Only one lateral ala present, on 



FiGUKB 1. — Odontospirura cetiopenis, new species : 

 En face view of head 



left side of body ; it can be distinctly traced for about two-thirds the 

 length of the body. Each of the lateral lips bears six conspicuous 

 teeth on its inner edge. 



Male, 15 mm to 17 mm long by 500/i, wide in maximum width. 

 Esophagus divided into two distinct parts, an anterior muscular 

 part 430/x long and a posterior glandular part 3.55 mm long. Nerve 

 ring about 360)ut from anterior end of body. Cervical papillae 440ja 

 from anterior end of body. Head distinctly set off from rest of body 

 by a constriction at the base of the lips. Mouth opens into a short 

 buccal cavity, the length of which equals approximately the height of 

 the head. Caudal alae supported by four pairs of preanal and two 

 pairs of postanal pedunculate papillae; a pair of sessile papillae 



