PLATE XX. 



ERRATA. 



Page 163, line 8, for PL XX, fig. 19, read PL XX, fig. 22. 



21, for PL XX, figs. 2024, read PL XX, 

 figs. 1921. 



On explanation of PL XX 



Read figs. 1921. Cl. pusillum var. mouolithum 



Wittr. (x 520). 

 fig. 22. CL pusillnm var. major Racib ( x 400). 



