ACANTHOCHEILONEMA PERSTANS 



4*5 



the head. The tail is curved and presents a cuticular thickening which 

 forms two triangular appendages. The anus opens at the apex of a 

 papilla situated in the concavity of the curve formed by the tail 150 //, 

 from the end. The diameter of the tail just before termination is 



<ro2 mm. 



FIG. 2gg.Mf. perslans in thick film, dried and stained with hsematoxylin ; 

 4, unshrunken ; 5, shrunken, x 1,000. (After Fulleborn.) 



The adult male measures 45 mm. in length by 60 //, to 80 //, in 

 breadth. The diameter of the head is 0*04 mm. The tail is much 

 curved. There are four pairs of pre-anal papillae and two pairs of 

 post-anal papillae. Spicules very unequal in size. Cloaca 121 /* from 

 the tail end. At the tail end two triangular cuticular appendages. 



