16 NEW YORK STATE MUSEUM 
Pohlman [1881, 1882, 1886] published descriptions of the following 
eurypterids from these rocks at Buffalo: 
Pterygotus buffaloensis 
Ceratiocaris grandis (=Pterygotus grandis (Pohlman) C. & R.) 
Eurypterus giganteus (=E. pustulosus Hall) ' 
Pterygotus globicaudatus (E. pustulosus Aall) 
P. acuticaudatus (P. buffaloensis) 
P. quadraticaudatus (P. buffaloensis) 
P. bilobus Huxley & Salter (=P. buffaloensis) 
Eurypterus scorpionis Grote & Pit =Dolichopterus macro- 
chirus Hall) 
While the splendid collection at Buffalo was being brought together 
and some part of its treasures made known by the publications referred 
to, other rocks of this State as well as of adjoining regions were giving 
evidence of the presence of very remarkable eurypterid remains. 
In 1882 Whitfield recorded the occurrence of an Eurypterus in the 
Siluric waterlime of Ohio, which was fully described as E. eriensis 
in the Report of the Geological Survey of Ohio, volume 7, 1893, and Walcott 
announced the discovery of a multispinose eurypterid leg in the Utica 
slate near Holland Patent, Oneida co., N. Y. The genus Echinognathus was 
proposed for this new type and the species described as E. clevelandi. 
In the same year Prof. D. 5. Martin at a meeting of the New York 
Academy of Sciences reported that he had seen in the State Museum a 
head shield nearly a foot in length and breadth from the Catskill beds 
at Andes in Delaware co., N. Y. This was described and figured by Hall 
the following year as Stylonurus excelsior, a gigantic rep- 
resentative of a genus already known from the Ludlow beds of Scotland. 
Another carapace of this species from the Catskill beds of Pennsylvania was 
described the same year by Claypole as Dolichocephala lacoana. 
The next year [1884] James Hall described for the Second Geological 
Survey of Pennsylvania an interesting fauna of eurypterids found in the 
Productive Coal Measures. The first announcement of a eurypterid of 
