Geographical Distribution of Crustacea. 223 
. Having in the preceding pages on the geographical distribution 
of Crustacea, treated of their distribution according to zones of 
temperature, I now take up the other branch of the subject.— 
T'he Distribution of Crustacea according to Geographical 
Provinces. 
In presenting a series of tables in which the distribution of the 
Genera is given, I divide the surface of the globe, for marine zo- 
ological geography, into three sections, the Occidental, the Afri- 
co- European, and the Oriental ; the first, including the east and 
west coasts of America and adjoining islands; the second, the 
eastern side of the Atlantic Ocean, the coasts of Europe, and also 
of Africa as far as the Cape of Good Hope ; the third, embracing 
the Indian Ocean, and its coasts and islands, the East Indies and 
the Pacific Ocean, with its coasts and islands, exclusive of the 
western coast of ÀÁmerica and the neighboring islands. "l'he to- 
tal number of species in each is given in a separate column. 
. Imake further groupings or subdivisions, by which the several 
portions of these great regions are distinguished. "'T'hese general 
tables are not here copied from the author's Report, and particular 
explanations therefore need not be given. 
'T'he following is an abstract of some of the results: 
'T'he division A, includes the Atlantic and Pacific coasts and 
islands of America; B, the European and West African coasts 
and islands, from Cape Horn to Greenland inclusive; and C, the 
coasts and 1slands of the Indian and Pacific Oceans (America ex- 
cluded).* 
I. BRACHYURA, 
MarOIDEA. wr" B. c. 
Maiinea, . - - 69 - 24(1a - . 683 (15)f 
Parthenopinea,  - : : 1 : 5 - 29 
Oncininea, à - . 0 - 0 E 2 
Total Maioidea, - - "70 29 (1) 104 (1) 
CANCROIDEA, 
Cancridz, - . - 10 - 8 - 1 
Xanthidz E - -[Lot - T(ta).—-- Joe pan 
' Eriphidee, - * 3 NX mw iB - 52 (1 5) 
Portunidze, Platyonychide an 
Podophthalmidie, 13. - 19(2 -  64(Pa) 
Telphusinea, - - - 6 - 1 - T 
Cyclinea, - 3 - 1 PEU : 0 
Total Cancroidea, - 54 35 (2) 243 (3) 
* The discrepancies between the enumeration here and the summaries of the pre- 
ceding tables, arise from species omitted in one or both, on account of the uncer- 
tainty of their localities. 
1 1o, means that 1 of the 24 is identical with a species under À ; and 15, that 1 
of the 63, is identical with a species under B. So, below. 
