WATERLIME GROUP. 
383 
previously described by Dr. Scouler in the Edinburgh Journal of Natural 
Sciences for 1831, as Eidothea*. 
In 1839, Fischer de Waldheim described a species of Eurypterus from 
Podolia, the E. tetragonophthalmus (Bulletin de la Soc. Imper. des Natur. 
de Moscou). 
In 1841, Mr. Conrad, in the Annual Report on the Palasontology of 
New-York, page 38, refers to the Eurypterus, recognizing but a single 
American species, the E. remipes, which, he says, when perfect, has a 
long spiniform tail like Limulus , but more obtuse and finely serrated. 
In 1843, Mr. Vanuxem, in his Geological Report of the Third District 
of New-York, figured an outline of the head and first articulation of the 
E. remipes; such fragments being far more common than other portions 
of the fossil. 
Burmeister (Organization der Trilobiten, etc., 1843, p. 62), and the 
same work, edited by Professors Bell and E. Forbes, and published by 
the Ray Society, 1846, pp. 52 & 54, and in the preceding pages, has 
discussed the relations of the Eurypterus to the trilobites and other 
Crustacea. 
1850 — 1856 : H. G. Bronn and F. Rcemer (Lethea, pi. ix, f. 1 & 2 as 
above, and PI. ix 3 ), the latter figure being of the E. lacustris of Harlan. 
In 1851, Dr. Ferdinand Rcemer, in Dunker and Yon Meyer’s Palseonto- 
graphica, gave a notice of the genus : “ Ueber ein bisher nicht be- 
“ schreibenes exemplar von Eurypterus, aus Devonischen schichten des 
“ Staats New-York in Nord-Amerika”. The specimen figured is the E. 
lacustris of Harlan, which preserves the head and body entire, with a 
portion of the spineform tail and two of the appendages on one side. 
1853 : James D. Dana, Crustacea of the United States Exploring 
Expedition under Captain C. Wilkes, Yol. ii, p. 1450f. 
* Dr.HiBBERT (loc. cit.) has erroneously referred to Dr. Harlan as the author of the Genus Eurypterus, 
citing the generic description which is quoted from Dr. Dekay’s original paper in the Annals of the New- 
York Lyceum. 
f Dr. Harlan is here erroneously cited as the author of the Genus Eurypterus. 
