230 NEW YORK STATE MUSEUM 
of the eyes, and the subcircular outline of the preabdomen. Laurie properly 
compares his Eurypterus scoticus with Eusarcus scor- 
pionis Grote & Pitt. It has the outline of body and the limbs of 
an Eusarcus. Further, the imperfectly known Eurypterus acro- 
cephalus Semper (1898), a Bohemian form, belongs here. Its subtri- 
angular carapace which gave the species its name and the broad, abruptly, 
contracted preabdomen warrant this reference and Semper has correctly 
Figure 52 Metastoma of 
Ewsareus punic- 
tatus Salter. Nat- Figure 53 Eusarcus obesus 
ural size. (From Wood- (H. Woodward). Natural size. (From 
ward) Woodward) 
pointed out the similarity of its species to E. scorp ionis and 
E. scorpioides. Finally the Stylonurus (?) simon- 
soni Schmidt is distinctly an Eusarcus, as we have set forth in the 
appended footnote.' 
1 This species was originally described as Eurypterus simonson i and 
later referred with doubt to Stylonurus, the author stating that he believes the form to 
represent a new genus closely related to Stylonurus. The latter reference is based on 
the surface sculpture and the similarity of a detached part to the long last leg of Styl- 
onurus. The specimen shows the metastoma which, as Schmidt remarks, differs from 
all other metastomas. In its triangular, pear-shaped outline it agrees completely with 
that of Eusarcus. The sculpture, also, consisting of disklike prominences with raised 
