1 



ERRATA. 



Instead of "latter" in 19th. line of page 268. read "former." 

 Instead of '■^ phlegniaria" in 29th. line of page 268. read '■'■ Pklc^niaria." 

 Instead of " Rhabenhorst " in foot-note of page 274. read " Rabenhorst." 

 Instead of '■^ phlegmaria" in 17th. line of page 276. read " Phkgnian'a." 

 Instead of " hypobasal " in 3rd. line of page 290. read " epibasal." 

 Figures 7, 8, 9, 10, 11, 12, 13 and 14 are all lithographed from photographs. 



