* 
444 Stimpson on the Crustacea and Echinodermata | 
Art. XX VIL— On the Crustacea and ECHINODERMATA of 
the Pacific Shores of North America. By Wm. Stimpson. 
Part L Crustacza. 
Tsere is no part of the world in which so large acces- 
sions to our knowledge of Zoólogy and Botany have been 
made within the past five years, as in that part of our con- 
tinent which lies west of the Rocky Mountains. The 
results of the numerous government surveys, as elaborated 
by Bairp and Grrarp, and the investigations of Cassin, 
Ayres, and the Californian naturalists, have brought to light 
hundreds of new and interesting Vertebrates, while the 
Insects have been extensively studied by Le Conve and the 
Testacea by Goutp. The Marine Invertebrata have how- 
ever as yet excited but little attention among our natural- 
ists. With the exception of the descriptions of Crustacea 
by Dana and RaxpaLL, nothing has been done here in this 
department, while in Europe several articles having Dore 
or less relation to the subject have recently appeared in 
various scientific periodicals. 
It is with the view of calling attention to this interesting 
division of our western fauna, and of opening a rich field, 
that I have been led here to give something more than a 
description of the novelties collected by Mr. Samuels ;—1n 
fact, to present a view of the present state of our knowledge 
of the Crustacea and Echinodermata of the West Coast." 
* The following works have been consulted in the preparation of this article : 
For the Crustacea :— 
An. Fr. WiEkGMANN. Beschreibung einiger neuen Crustaceen des Berliner Mu- 
seums aus Mexico, ete. Archiv für Naturgeschichte, 1836, i. 145-151 
J. W. RANDALL. Catalogue of the Crustacea brought by Thomas ; 
J. K. Townsend from the West Coast of North America, with descriptions and 
Jigures of new species. Journal of the Academy of Natural Sciences of 
Philadelphia, vol. viii. 1839, pp. 106-147. Pl. WI—VII 
R. Owen. The Zodlogy of Captain Beechey’s Voyage, Crustacea. ( 1839.) 
M.M. Mitwz-Epwarps et H. Lucas. Description des Crustacés nouveaut 
peu connus. Archives du Muséum d'Histoire Naturelle, 1841, ii. 461. 
APRIL, 1857. 
