Eurypterus maria nov. 



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See plates 2 and 3 



An entire individual 5.5 mm in length. This specimen presents 

 11 segments and telson, so far as it has been possible to 

 determine them. On the left side the abdominal contraction 

 is emphasized, in some measure perhaps by distortion. On 

 the carapace the size and position of the eye spots as repre- 

 sented is somewhat presumptive in view of the character of 

 the preservation. 



Another individual entire except for a part of the telson and 

 having an actual length of 8 mm. Here the postabdominal 

 contraction is slight, the total number of segments 12, the 

 eyes apparently almost marginal although this position is 

 again uncertain, and traces of legs are seen. 



An incomplete specimen 20 mm in actual length. This pre- 

 sents in part the ventral aspect of the animal, showing the 

 position of the metastoma in place, one swimming foot and 

 segments. 



A specimen with an actual length of 8 mm, head and seven 

 segments. The head shows fully developed subcentral eyes 

 and central tubercle bearing the ocelli. 



