94 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



of the accessory piece, *±£± ; 3/, tail of an adult female 

 specimen, X the left lateral papilla, ^^ 5 %» ventral view 

 of the terminal portion of the tail of an ova-bearing female, 

 presenting the two papillae, 27 1 00 ; 3h, tail of a young larva, 

 0.44 mm. long, 13 1 70 (the striae of the cuticula are not 

 drawn). In this figure the margins of the posterior half 

 of the tail ought to be slightly convex. 



