ERKATA. 



Page 124. line 2. for "Fig. 3." read "Fig. 4." 



140. line 6. from bottom,' for "Plate XXIII." read "Plate XVIII." 



153. line 10. for "Fig. 1." read "Fig. 2." 



154. line 10. for " ZTGNBMA ALTERNATUM " read " Z. REVERSUM." 

 199. line 2. for " Plate LII. Fig. 3." read " Plate LII. Fig. 6." 

 231. line 6. from bottom, for " Figs. 2, 7, 6." read " Figs. 1, 2." 



260. line 8. from bottom, for "Fig. 3." read "Fig. 1." 



261. line 10. for " Fig. 1." read " Fig. 3." 



291. line 9. for " Plate LXXV." read " Plate LXXVI." 

 394. line 12. for "Fig. 15." read "Fig. 16." 



