Chap. IL THEIR WIDE DISTRIBUTION. 127 



seems to have best retained its original size 

 and ajDpearance. Notwithstanding some loss 

 from disintegration, five of the largest of these 

 castings (after liaviug been well sun-dried) 

 weighed each on an average 89*5 grammes, 



Fig. 4. 



A castina: from the Nilgiri Mnuntains in Suuth India ; of 

 natural size, engraved from a photograph. 



or above 3 oz. ; and the larirest weighed 

 1 23*14 grammes, or 4^ oz., — that is above a 

 quarter of a pound ! The largest convolutions 

 were rather more than one inch in dii meter ; 

 but it is probable that they had subsided a little 



