446 Stimpson on the Crustacea and Echinodermata 



museum, obtained mostly through the researches of Lieut. 

 Trowbridge, Drs. Suckle y and Newberry, and Mr. A. S. 

 Taylor. These specimens, together with those found by 

 myself while on the North Pacific Exploring Expedition, 

 form a large addition to Mr. Samuels' s collection, and have 

 enabled me to make more extended and satisfactory obser- 

 vations upon these divisions of our Western Fauna. 



It will be seen that more than one hundred and thirty 

 species of the class Crustacea have been determined to 

 exist in the region now under consideration, a number 

 which seems quite large when we consider that so recently 

 as in the year 1838 not a single species was known to 

 science as forming part of its fauna.* But we cannot sup- 

 pose even this number to be more than a fourth part of that 

 which will be reached when a thorough search shall be insti- 

 tuted. Many families which are undoubtedly represented 

 here by one or more species, have not yet been noticed ; 

 and that part of the coast which is included within the 



W. P. Gibbons. On a new genus of Crabs. Proceedings of the California 



Academy of Natural Sciences, 1855, vol. i. pp. 48, 49. 

 T. Bell. Horoz Carcinologicce, or Notices of Crustacea. I. A monograph of the 



Leucosiadoz. Transactions of the Linnaean Society of London, 1855, xxi. 



277. PI. XXX— XXXIV. 

 W. Stimpson. On some Californian Crustacea. Proceedings of the California 



Academy of Natural Sciences, 1856, vol. i. pp. 87-90. 

 Descriptions of new species of Crustacea from the Western Shores of 



North America. Proceedings of the Boston Society of Natural History, 



1857, vol. vi. pp. 84-89. 



For the Echinodermata : — 



Eschscholtz. Zbologischer Atlas. 



E. Brandt. Prodromus descriptions animalium ah H. Mertensio in orbis terrarum 

 circumnavigatione observatorum. Eascic. I. Petropoli, mdcccxxxv. 



J. E. Ghat. On the class Hypostoma. Annals and Magazine of Natural His- 

 tory, vi. 176, etc. 



Valenciennes. Voyage de la Venus. 



W. 0. Atres. On Californian Echinodermata. Proceedings of the California 

 Academy of Natural Sciences, 1855, i. 68. 



* " Nous ne savons rien sur les Crustaces de la cote occidentale de 1' Amer- 

 ique du Nord." Milne-Edwards, Hist. Nat. des Crust, iii. 564, (1840.) 



