Eurypterus myops nov. 



Page 306 



1-5 Heads of this species, showing the quadrangular form and 

 some slight variation in the position of the large approxi- 

 mate eyes. Figures 3-5 are natural size. 

 Figure 6 may possibly belong to this species, and represent 

 a young phase with the eyes well toward the margin. 



Pterygotus ? otisius nov. 



Page 308 



7 A quite distinct form of head with anterior almost marginal 



eyes, ocellar mound and smooth surface. 



Eurypterus or Pterygotus 



8 Eye of a large specimen. 



Stylonurus ? sp. 



Page 308 

 See plate 7 



9-1 1 All these segments show a lobation which seldom occurs in 

 the Eurypterids but is best exemplified in the species of 

 Stylonurus described by Fr. Schmidt [see p. 309]. The large 

 segment in figure 11 indicates how a slight lateral shearing 

 has developed this lobation into a sharp division line 

 (suture?) at the right, while from the same line, -of weak- 

 ness at the left the whole lateral moiety of the segment has 

 been completely distorted. 



12 Two long slender leg joints. 



Phyllocarida 



Page 309 



See plate 8 



13 The middle spine or telson of a phyllocarid. 



