S. I. Smith — Crustaceans of the Atlantic Coast. 
127 
appear to be represented in the European Seas. Ot the five other 
species recorded from Cape Cod Bay, all are common far to the south 
and none of them are truly arctic species, although a single one, 
Crangon vulgaris, extends north to the Gulf of St. Lawrence and to 
Europe. 
The following, in addition to list (1), are southern species occurring 
north of Cape Cod Bay only accidentally or in exceptionally pro- 
tected localities: 
Callinectes hastatus. 
Panopeus Harrisii. 
Libinia emarginata. 
Eupagurus longicarpus. 
Pakemonetes vulgaris. (2.) 
Heteromysis formosa. 
Mysis Americana. 
Excluding the species in lists (1, 2), there are left eighteen northern 
species which extend south of Cape Cod. Of these, 
Hyas eoarctatus, 
Eupagurus bernhardus, 
E. pubescens, 
Hippolyte pusiola, 
Pandalus Montagui, (3.) 
Tbysanopoda inermis, 
Eudorella deformis, 
are northern and European species which extend but a short distance 
south of Cape Cod, where they are found usually only in cool waters 
of exposed localities, or, in the case of Thysanopoda inermis, only 
in winter. 
Of the eleven remaining species which occur both north and south 
of Cape Cod, 
Cancer irroratus, Crangon vulgaris, (4.) 
C. borealis, Mysis stenolepis, 
Homarus Americanus, 
have about equally extensive ranges and are about equally common 
both north and south of Cape Cod, and must be regarded as belong- 
ing properly to both faunae. The others, 
Diastylis politus, I Piastylis abbreviates, (5.) 
D. Bculptus. Eudorella hispida, 
D. quadrispinosus, ' E. pusilla, 
are all Cumacea which may fall in the same category as the four pre- 
ceding species, although it is probable that some or perhaps all of 
them will be found to belong more exclusively to the northern fauna. 
None of the species in the last two lists are known to extend far 
north, nor, with the exception of Crangon vulgaris, to Europe, 
although they all belong to genera well represented in European seas. 
Excluding, from the number of species recorded from both north 
and south of Cape Cod Bay, the seven southern species (2) which 
