286 



ARACHNIDA EURYPTERIDA 



Fig. 162. Eurypterus fischeri, Eichw. Upper Silurian, Rootzikiill, Oesel. Restoration 



of ventral surface ; 1-6, appendages of prosoma ; w, nietastoma. Inimediatel}' pos- 

 terior to the metastoma is the "median process" of the genital operculum. (After 

 Hohu.) 



