PLATE 81 C 
Page 
Fig. 1. Eurypterus robustus*. 410* 
1. View of the specimen from the lower side. 
2. The ventral side of another specimen of this species, from the collection of Prof. J.S. 
Gardner of Whiteshoro’ (N.York), showing more distinctly the fracture or dehiscence 
across the segments, indicating the specimen to have been a cast crustf. 
* A farther examination, with other specimens, has shown that the form referred to E. lacustriSy var. robustus, 
has the characters of a distinct species. 
■f Some copies are without this figure. 
