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 collections 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 Horne 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.
- Siphonotreta 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 description 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
