I 'LATH XXXIX. 



Kinun-s magnified :',7."> 



I'AC.I;. 



Fi^s. 1i 2- MlCRASTERIAS RINGENS, two forms, 123 



Kitf. 3. MlCRASTERIAS CRUX MfiUTENSIS, . 1*23 



" 4. M;RASTERIAS PSEUDOFUKCATA, . 

 Figs. 5, 6. MIORASTERIAS FURCATA, two forms, . 1-X 



