the Genus Ciassicauda. 



415 



'T 



.erra Nova' material. On re-examination, however, the 

 writer lias not found less than nine on either side in any 

 individual, while in one case (fig. 2 A) there were as many as 



C. ciuissicauda ; tail of female, nearly ventral view, a., anus ; r., \ulva ; 



va. 



., vagina. 



twelve on the left side and eleven on the right. It is not 

 easy to count the papillce accurately, owing to an infolding 

 of the sides of the tail towards the mid-ventral line, so as to 



