Page:The Eurypterida of New York Volume 1.pdf/98

 sandstone of lower Quebec, the fish beds at Campbellton, N. B., the  of the Portage sandstone, the gigantic   of the Catskill beds of New York and   from the Chemung of Pennsylvania.

The Waverly beds of Pennsylvania, near the New York boundary, have furnished a single straggler in  but the Productive Coal Measures of Pennsylvania frequently contain remains of the peculiar phylogerontic group of the genus Eurypterus, distinguished as Anthraconectes.

In Scotland and on the shores of the Baltic occur beds comparable in wealth of merostomes with those of New York, and there the eurypterid horizons exhibit a remarkable parallelism with our series and are approximately homotaxial.

The lowest distinct eurypterid horizon in Scotland is the lower one in Lanarkshire and the Pentland hills, characterized by species of Eurypterus and Stylonurus and especially by the genus Slimonia and is now correlated with the Wenlock. It hence corresponds in age to our lowest American eurypterid horizon, that of the Kokomo waterlime. It has in common with the latter the primitive stylonuroid genus Drepanopterus.

The upper horizon of the Lanarkshire eurypterids is in beds that protrude, islandlike, from the Old Red sandstone and for this reason were formerly confused with the latter but are now correlated with the Ludlow and the "Passage" beds. Their fauna corresponds in age to our Salina faunas. The presence of species properly referred to Eusarcus ( Woodward) and Hughmilleria