404 * 
PALAEONTOLOGY OF NEW-YORK. 
Euryjrterus remipes. 
Plate LXXX. Fig. 1-12; Plate LXXX A. Fig. 1-6; and Plate LXXXIII B. 
Fig. 2. 
Eurypterus remipes : Delay, Annals of the Lyceum of Natural History of New-York, Vol. i, 
pa. 375, pl.xxix : 1825. 
E. remipes : IIarlan, Transactions of tlie Geological Society of Pennsylvania, Yol.i, pa.OC, 
pi. v : 1832. 
— — : Idem, Medical and Physical Researches. 
— — : Milne-Edwards, Hist. Nat. des Crustacees, III, p. 422. 
— — : Burmeister, Organization der Trilobiten, p. G2 : 1843. 
— — : Idem, Ray Society Publication, 1846, p. 54. 
— — : Bronx, I.etliea Geognostica, I, p. 109, t. ix, f. 1. 
— — : Salter, Quarterly Journal of the Geological Society of London, p.235 : 1859.. 
Also cited by numerous other authors. 
Not Eurypterus remipes, Eichwald, Bui. Imp. Soc. Nat. Moscou, 1851. 
Hot — — IIcemer, Palfeontographica, I, t. 27 : 1848. 
Not — — R<emer, Lethea, Ed. in, 1854, t. ix 3 , f. 1. 
Carapace roundish or semioval, about three-fourths as long as wide, often 
“ marked anteriorly by a deep indented line formed by the junction 
“ of the superior and inferior plates”. Eyes lunate, depressed or mo¬ 
derately convex, marked by concentric striae. Body moderately convex 
above, elongate, tapering; the thorax in the middle a little wider than 
the carapace, contracting below the seventh articulation; the abdomi¬ 
nal portion distinctly narrower, and the length of the joints increasing, 
the last being extended into a long slightly curved triangular spine 
which is serrated at the angles. Joints of the body slightly imbricating; 
and some of the abdominal joints, at the lateral margins, slightly pro¬ 
longed over the ones below in angular processes. 
On the lower side, a small oval post-oral plate, slightly notched on its 
anterior margin, overlaps the adjacent edges of the broad plates of the 
swimming feet, and apparently lies upon the cavity of the mouth. The 
four anterior pairs of feet converge towards the anterior margin of this 
plate : the first joints are short, and the second ones much longer ; the 
first two or three joints are unarmed, while the remaining ones are 
furnished on their outer angles with smooth chelate tips, the extreme 
one of all being the longest. The two anterior pairs of feet extend but 
