418 NEW, YORK STATE MUSEUM | 
there is plenty of evidence that the eurypterids in these waters of the 
Shawangunk sea reached considerable size and occurred in great profusion. 
The best specimens are identical or very closely related to the follow- 
ing species from Otisville: | 
tr Dolichopterus otisius Clarke. A number of carapaces 
with the characteristic subtrapezoidal outline. Three of these, at least, 
show the position of the compound or lateral eyes and the marginal 
doublures. 
2 Eurypterus maria Clarke. Carapaces with the very uni- 
formly rounded outline of that species but not exhibiting the eyes. _ 
3 Stylonurus cf. myops Clarke. Its presence 1s suggested 
by a patch of integument with the peculiar sculpture of that species. The 
sculpture resembles especially that of plate 53, figure 2. 
4 Hughmilleria shawangunk Clarke. A segment with 
the characteristic linear sculpture. Also several carapaces are referable 
to this species. 
5 Pterygotus cf. globiceps Clarke & Ruedemann. A 
very small somewhat distorted carapace of a Pterygotus may well repre- 
sent this species. 
Professor van Ingen has also succeeded in discovering still another - 
eurypterid fauna southwest of the Delaware Water Gap, at the Swatara 
Gap, Lebanon co., Pa. The interesting feature of this fauna is that it 
occurs in association with marine fossils suggesting horizons lower than 
the Salina and corresponding to parts of the Niagaran, possibly as low 
as the Clinton. 
Eurypterid remains were encountered in three beds distinguished as: 
182 B 16h, 152 B 23 and 182 C 4x. 
182 B 16h, an olive gray sandy shale, has furnished: 
1 Small carapaces, belonging to species closely related or identical 
with Eurypterus maria, Hughmilleria shawangunk 
and Pterygotus.globiceps 
