88 HABITS OF WORMS. Chap. II. 



been dragged into the burrows by the basal 

 than by the apical part; but we shall im- 

 mediately see how different was the result. 



Triangles of the above specified sizes were 

 scattered on the ground in many places and 

 on many successive nights near worm-bur- 

 rows, from which the leaves, petioles, twigs, 

 &c, with which they had been plugged, were 

 removed. Altogether 303 triangles were 

 drawn by worms into their burrows : 12 others 

 were drawn in by both ends, but as it was im- 

 possible to judge by which end they had been 

 first seized, these are excluded. Of the 303, 

 62 per cent, had been drawn in by the apex 

 (using this term for all drawn in by the 

 apical part, one inch in length) ; 15 per cent, 

 by the middle ; and 23 per cent, by the basal 

 part. If they had been drawn indifferently 

 by any point, the proportion for the apical, 

 middle and basal parts would have been 33*3 

 per cent, for each ; but, as we have just seen, 

 it might have been expected that a much 

 larger proportion would have been drawn in 

 by the basal than by any other part. As the 

 case stands, nearly three times as many were 

 drawn in by the apex as by the base. If we 



