1532 



CRUSTACEA. 



region in which the species occur, by using the letters a, b, c, d, e, f 

 g, h, as in the preceding tables. Thus opposite Libinia, 1 e in the 

 first column means that one species occurs on the west coast of North 

 America, and this one in the subtemperate region (e), the position of 

 which on the coast will be observed on the chart. So, opposite Eyas, 

 1 g, in the same column, implies that one species occurs in the sub/ 'rigid 

 region. These letters a, 5, &c, in the columns in some cases have a 

 more definite signification, than simply that of indicating the tempe- 

 rature region, for the reason, that species may have hitherto been 

 obtained only at a single point in such a region. Thus in the column — 



W. America, N., 



9>< 



signifies Puget's Sound. 



W. America, S., 



c > 



a 



the Gallapagos. 



a 



d, 



u 



Peruvian coast. 



u 



e , 



a 



the coast of Chili and mainly Valparaiso. 



a 



A 



a 



the coast of Chiloe. 



E. America, N., 



*, 



a 



Key West and the adjoining coast of Florida. 



a 



c, 



it 



the coast of Georgia, and the Carolinas, to Cape 

 Hatteras, hut mainly Charleston, South Carolina. 



E. America, S., 



h 



a 



Rio Janeiro. 



a 



e > 



u 



Rio Negro. 



u 



9, 



cc 



Falklands and Fuegia. 



E. Atlantic, S., 



e, 



(( 



Table Bay, South Africa. 



u 



f> 



ii 



Tristan d'Acunha. 



E. Africa, N., 



a, 



a 



southern half of Red Sea. 



u 



h 



a 



northern half of Red Sea. 



E. Africa, S., 



h 



(C 



Port Natal. 



a 



v, 



u 



Mauritius or Isle of France. 



Indian 0. and E. Indies, 



c> 



a 



Swan River, West Australia. 



W. Pacific, N., 



*, 



a 



Loochoo, Formosa, and part of South Japan. 



W. Pacific, S., 



h 



a 



Port Jackson, in East Australia, and Isle of King, 

 north of Yan Diemens Land. 



it 



f, 



n 



Van Diemens Land. 



Mid. Pacific, N., 



a, 



a 



Kingsmills and Wakes Island. 



a 



h, 



a 



Hawaiian or Sandwich Islands. 



Mid. Pacific, S., 



e, 



a 



northern part of New Zealand. 



a 



/, 



tt 



middle part of New Zealand. 



a 



9> 



it 



southern extremity of New Zealand and the 

 Aucklands. 



Other information respecting the use of the letters will be gathered 

 from the Chart. 



The order of the genera is the same as in the preceding tables, and 

 the subdivisions into families may there be ascertained. 



