Ferrier and Yeo, 
Phil Trans. 1884 
piate :>:> 
Fig. 149 
Fig. 150 
Fig. 151 
Fig. 152 
Fig. 153 
Fig. 154 
Fig. 155 
*pheo and Printed by the Photomechanical Printino 
Lansoowne Roac. Tottenham 
Photoor* 
Fig. 156 
