THE EURYPTERIDA OF NEW YORK 15 
added to the longer known species of eurypterids (E. remipes 
and E. lacustris) the following new types, all from the rocks of 
New York: 
Eurypterus microphthalmus E. pachychirus 
E. lacustris var. robustus _ E. pustulosus 
EK. dekayi 
He erected the new subgenus Dolichopterus (now given full generic 
standing), for the species D. macrochirus and also recorded the 
presence of the genus Pterygotus (theretofore known only from Scotland) in 
the Salina waterlime, describing three species, viz, P. cobbi, 
P. macrophthalmus and P. osborni. 
It is obvious that Hall, with his accustomed thoroughness, had availed 
himself of all New York collections extant, from the fact that for a 
decade and a half not a line was added to his investigations on -American 
species, notwithstanding the intense activity in other branches of paleontol- 
ogy, and the further fact that Henry Woodward was meanwhile [1866-78] 
publishing his excellent Monograph of the British Crustacea of the Order 
Merostomata. During this period the large coment quarries at Buffalo were 
gradually producing a great number of striking specimens and these became 
somewhat widespread through the museums until, in later years and with 
keen and intelligent interest the proprietor of the quarry took measures to 
see that they were carefully safeguarded and donated to the Museum of 
the Buffalo Society of Natural Sciences. Some of the early collectors in 
Buffalo undertook to describe the supposed new material that at first 
found its way into that museum but, being trained in branches of science 
remote from paleontology, they succeeded only in creating for the most 
part a burdensome mass of synonyms. Thus Grote and Pitt [1875-78] 
described the following: 
Busarcus scorpionis, representing a new and important genus 
E.grandis(E.scorpionis) 
Pterygotus cummingsi (not properly defined) 
