the Genus Crassicauda. 415 
‘Terra Nova’ material. On re-examination, however, the 
writer has not found less than nine on either side in any 
individual, while in one case (fig. 2 A) there were as many as 
Fig. 4. 
| 
8) 
aM 
"WU O.} 
? 
a., anus; v., vulya; 
2. 
C. crassicauda ; tail of female, nearly ventral view. 
va., vagina, 
twelve on the left side and eleven on the right. It is not 
easy to count the papillee accurately, owing to an infolding 
of the sides of the tail towards the mid-ventral line, so as to 
