PeyrvoldLs . 
Phil. Trans. 1883 . Plate 72 
ill 
Kg . 10 
k 
D 
l/ & <2r 
Pig.15. 
r 
W/////M - 
k 
---- /MM/M/M/M S/lMHl 
Fig. 16. 
■r-miff—— 
"Westlfev/man S C? lith. 
