S. I. Smith — Crustaceans of the Atlantic Coast. 
131 
the Greenland fauna has been studied almost exclusively by Euro- 
pean zoologists to whom the fauna of our coast has usually been 
very little known. The earlier American zoologists fell into the 
same error, and, being without specimens of the known European 
species for comparison, and without sufficiently accurate figures or 
descriptions, described as new species already known from European 
and Greenlandic seas. This process has sometimes been reversed, 
however, the species being first described from our coast and later 
from the European. But the crustaceans have been more fortunate 
in this respect than some other classes of animals. 
Further on, I have discussed the facts in regard to the geographical 
distribution of the Thoracostraca of Greenland, and need not specially 
allude to them here. The relation of the Thoracostracan fauna of the 
region between Cape Cod and Labrador to that of Greenland, that 
of Europe, and that of the region of Bering Sea, is shown in a gen- 
eral way in the summary, previously given, of the table of distribu- 
tion (A), but is better shown if we omit from the summary the 
southern species (1, 2) which properly have no place in the fauna. 
Rejecting these, there are left belonging to the fauna between Cape 
Cod Bay and Labrador, sixty species, of which twenty-six are known 
in Greenland, thirty-seven in Europe, and fourteen in the region of 
Bering Sea. This is shown for different groups of Thoracostraca, in 
the following table: 
O 
•S rJ 
T3 
Europe. 
<*-4 03 
o © 
(B.) 
o •n 
O C3 
© % 
£r , 'e3 
Js 
13 
© 
2 
ci> 
a ^ 
O fcJD 
'Sc.S 
a j t-> 
X* 
Brachyura .. 
6 
3 
2 
2 
Anomura 
6 
2 
4 
3 
Macrura 
22 
13 
16 
9 
Total Decapoda 
34 
18 
22 
14 
Sehizopoda 
9 
4 
6 
Cumacea 
17 
4 
9 
Total 
GO 
26 
37 
14 
This shows that a little more than three-fifths (sixty-one per cent.) of 
the species known to our northern marine fauna are common to the 
European fauna, while over two-fifths (forty-three per cent.) are found 
in Greenland, and that the proportions are very nearly the same if 
