PLATE IV. 



FIG. _,, , 



1.— Stephanastrum sp. Ehrenherg. 

 2.— Astromma Aristoteles. Ehi-enberg. 

 3._St,ylosphrera sp. Ehrenberg. 

 4. — Haliomma with four spiues. 

 5._Lychnocainum faloiferum. Ehrenberg. 

 6._Stylospha3ra, var. (?) mth outer web (?) 



