136 THE HABITAT OP THE EURYPTERIDA 



macrophthalmus . Imperfect remains are all that have been found of 

 the five species of Eurypterus: scoticus, punctatus, minor, cyclopthalmus 

 and conicus. 



In the Girvan area near Straiton where continuous marine, though 

 near-shore deposition was going on through Tarannon on into Wenlock 

 time, the strata are found to be highly fossiliferous at certain horizons 

 and graptolite bands are well made out. Collections made in a quarry 

 near Blair Farmhouse not far from the village of Straiton have 

 yielded a number of fossils, among which is a Eurypterus sp. Owing 

 to the fact that British geologists seldom state the exact horizon at 

 which fossils are collected, and of course this is often difficult to do 

 when the strata stand on end and break off in slabs from which collec- 

 tions are made, it is impossible to say whether the eurypterid occurred 

 in a seam with the Crustacea while the undoubted marine forms 

 occurred in other seams, as is found so often to be the case. The list 

 given by Peach and Home is merely quoted as coming from this 

 quarry (215, 549). 



Eurypterus sp. 



Beyrichia kloedeni (M'Coy) 



B. impendens (Jones) 



Entomis globulosa (Jones) 



Monograptus galaensis (Lapw.) 



M. priodon (Bronn) 



M. riccartonensis (Lapw.) 



M. vomerinus (Nich.) 



M. sp. 



Retiolites geinitzianus (Barr.) 



Favosites sp. 



Lingula symondsi (Salt) 



L. sp. 



Orthis sp. 



Siphon otreta anglica (Morris) 



Cardiola fibrosa (Sow.) 



Bellerophon sp. 



Orthoceras subundulatum (Portl.) 



After this rather careful study of the occurrences in the Wenlock, 

 "we are in a position to form a valuation of the hypothetical descrip- 

 tion of this formation and its fauna, which I gave on page 130 above, 

 and which may be fairly taken as the prevalent view expressed in 



