206 
ST. HELENA. 
n addition to the marine Crustacea above mentioned, there are 
several lands of crabs. That known locally as the “ Purple Eock” or 
I eeimg Crab,” is found on the rocks at water-mark, and is much 
sought for by fishermen, who consider it the best bait for catching 
fish The common “Black Crab” is much more abundant, and 
exists in thousands along the sea coast, where, on the hard lava 
rocks, in colour very similar to its own, it may be seen scram- 
mg about as crabs only can scramble, in and out of the creeks and 
holes into which the surf dashes. A somewhat small bright orange- 
red coloured crab is very rare, but one specimen was brought to me 
jom Breakneck Valley, on the leeward side of the Island. The 
. -^ ur P le band Crab ” is also uncommon,- it has very large claws, and 
is taken occasionally in deep water. 
CLASS IV. — ARACHNID A. 
Although doubtless there are still more to be found with careful 
search, there are not many Spiders in the Island ; those, however 
which have been brought to light form a very interesting portion of 
its fauna, since nineteen species out of forty which have been col- 
lected have been pronounced by the Eev. 0. P. Cambridge, who has 
examined and described* my several collections, and to whom I am 
much indebted for other kindness and ready assistance, to be new 
to science, and, as such, I do not think it would be too presuming 
to conclude, also indigenous to the place. Of the remaining twenty- 
one species, nine are indigenous to Great Britain, two European, five 
Egyptian, two Algerian, two from Ceylon and India, and one from 
East Central Africa. These have all most probably been introduced 
through the medium of commerce and the introduction of plants in 
Wardian cases. Mr. Cambridge says, in reference to the charac- 
teristics of this portion of the Island fauna, after his final examina- 
tion of the several collections, that " The European stamp observed 
upon in regard to the spiders of the former collection is thus equally 
marked in those now recorded and described.” 
It is worthy of note that the native spiders are, almost as a rule 
least abundant now in the Island ; in each case where I met with 
only one specimen it turned out to be a new species. It is therefore 
Proceedings of Zoological Society, London, Nov. 25, 1869, and March 4, 1873. 
