Eurypterus maria nov. 



Page 305 

 See plates 1 and 2 



1-7 A series of the heads showing notable variation in the position 

 and size of the eyes. All are immature phases and the varia- 

 tion of these features seems to have but little direct relation 

 to the size of the animal. In figure 3, the eyes are apparently 

 absent. 



Eurypterus ? cestrotus nov. 



Page 307 



8 An individual, natural size, so crushed as to obscure the dis- 

 tinction of the cephalic parts but indicating the general form 

 of the animal and its segmentation. In figure 9 is given an 

 enlargement of the peculiar denticulate anterior cephalic 

 margin. 

 10 A head with portions of segments of a young individual, show- 

 ing the same denticulate margin. The eyes seem to be large 

 and far forward and the whole expression of the head is 

 such as to convey the belief that the animal pertains to a 

 genus as yet undefined. 



