BIBLIOGRAPHY 
OF THE 
MEROSTOMATAS* 
WITH AN ACCOUNT OF THE AFFINITIES PROPOUNDED BY THE 
VARIOUS AUTHORS. 
(For references see p. 20.) 
1. 1809. Mr. W. Martin’ gave a figure and short description of a Limuloid 
Crustacean from the Coal-measures, which he included with the Zri/oé:ta, and named 
Entomolithus monoculites ? (lunatus). 
2. 1811. Mr. J. C. Parxinson’ figured a similar fossil from the Coal-measures, 
Dudley. 
3. 1820. Mr. Cuarizs Konte’ figured a Coal-measure Limulus, naming it Beli- 
nurus bellulus, but there is no description accompanying it. 
4. We find the first notice of the discovery of Hurypterus in America (in 1825), by 
Dr. J. E. Duxay,* who described and figured the only species then known (Hurypterus 
remipes), and referred it to the class Crusracua, and to the order Branchiopoda. 
5. The remains of an English species of Hurypterus (probably two feet in length) 
were described in 1831 by Dr. J. Scournr,°’ of Glasgow, under the generic name of 
Eidothea. / 
6. Dr. Ricnarp Haruan’® published the description of a second American species 
in 1835 (#. lacustris). 
7. Prof. Mitnz-Epwarps,’ in 1834-36, observes, with respect to the genus Hurypterus, 
established by Dekay, “They have externally many points of resemblance to Pontia and 
Cyclops, and they also seem to indicate, in some respects, a passage between these 
animals and the Zsopoda. The body is broad and more or less pyriform, and the head 
very distinct from the thorax, which is divided into many segments, but is not separated 
by any marked distinction from the abdomen. ‘The head bears on its superior surface two 
reniform eyes, well developed, and distant from each other. Two pairs of antenne have 
also been distinguished; and whatever other appendages there may be, appertain to the 
mouth. Lastly, on each side of the first thoracic ring one sees a great lamelliform 
swimming-foot, with a rounded termination.” 
“ Geologists,” M. Milne-Edwards adds, “describe three species of Hurypterus, viz., 
E. remipes, Dekay, EF. lacustris, Harlan, and F. Scouleri, Hibbert.” 
* Should any omissions be discovered in this history, I shall feel obliged to paleontologists who will 
call my attention to them, that they may be inserted in the future parts of this Monograph.—H. W. 
t 
