94 NEW YORK STATE MUSEUM 
sandstone of lower Quebec,' the fish beds at Campbellton, N. B.,? the 
Stylonurus? wrightianus of the Portage sandstone, the gigantic 
S.excelsior of the Catskill beds of New York and 8. beecheri from 
the Chemung of Pennsylvania. 
The Waverly beds of Pennsylvania, near the New York boundary, 
have furnished a single straggler in E. approximatus but the 
Productive Coal Measures of Pennsylvania frequently contain remains of 
the peculiar phylogerontic group of the genus Eurypterus, distinguished 
as Anthraconectes. 
C Geological distribution in other countries 
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 Drepan- 
opterus. | : 
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 
(Eurypterus scorpioides Woodward) and Hughmilleria 
1 Clarke. op. cit. 1: 84. 
Whiteaves. Canadian Naturalist. 1883. t1o:roo. Clarke op. cit. 1: go. 
8 See Laurie, M., 1899, p. 575, and Kayser, Lehrb. der geol. Formationskunde, 
1908, p. go. 
