On the Geographical Distribution of Crustacea. 33 
and is not known in Oriental seas, except in New Zealand and 
Tasmania. So also the important genus ZJomarus; besides 
Hyas, Herbstia, Leptopodia, Atelecyclus, Munida, and Grimo- 
thea. 'lhe genus Homarus has one species on the coast of the 
United States, one on the coast of Europe, and one at "Table 
Bay, South Africa, thus ranging over the whole Atlantic. 
We may now treat separately of the several Kingdoms, and 
their subdivision into Provinces, pointing out the naturalness of 
their limits, and the characteristics of these Provinces. Each 
temperature region along a coast makes a distinct Province, which 
facts, where ascertained, show to be well characterized. In some 
cases, a further subdivision may be desirable, and when so, the 
subordinate divisions may be called Districts. In each Kingdom, 
the Provinces of each zone together may constitute a S'ub-kinz- 
dom, as the T'orrid Subkingdom, T'emperate Subkingdom, &c. 
In continuing the extracts from the writer's Report on Crusta- 
cea, the notes relating to the genera and species characterising the 
several provinces exhibiting their relations and distinctive char- 
acters may be here for the most part omitted. "The following 
are a few facts of special interest. 
'T'he relations of the Mediterranean region to Japan are men- 
tioned by De Haan.  'l'he genera strikingly Mediterranean which 
occur in Japan, are Latreillia, Nika, Caridina, Ephyra, Sicyo- 
nia, Ácheus, Pandalus, Lysmata ; and the species of the last 
three, together with Squilla mantis, are probably identical, viz., 
Pandalus pristis, Lysmata seticaudata, and Acheus Cranchii, 
which last is at least hardly distinguishable, according to De 
Haan, from the A. japonicus. |Portunus corrugatus 1s also 
closely like a Japan species, according to De Haan. The Cy- 
cloes of the Canaries is another of the Atlantic species, allying 
the Atlantic region to Japan, as above mentioned. — Doclea is also 
an Oriental genus, represented in the Occidental kingdom by La- 
binia. It has but one described species out of the Oriental kingdom. 
DECAPODA COMMON TO THE CELTIC PROVINCE AND THE MEDI- 
TERRANEAN.* 
1. Brachyura. Portunus Rondeletii, A. 
Maia squinado, A. i depurator (plicatus), A. 
. &€ 
Pisa tetraodon, A. / marmoreus. 
* ]anata (Gibsii), A. ! DU AM A. 
Achzus Cranchii, A. olsatus. 
Stenorhynchus phalangium, A. Carcinus mzenas, A. 
Eurynome aspera. Portumnus latipes, A. 
Perimela denticulata, À. Gonoplax angulata, A. 
Xantho floridus, A. Goniograpsus varius, À. 
. * rivulosus, À. Pinnothera pisum. 
Pilumnus hirtellus, Thia polita. 
Portunus pusillus. Corystes dentatus. 
* "Those species that are reported by Lucas from Algiers, are followed by the 
letter À. "They also occur elsewhere iu the Mediterranean. 
5 
