128 
S. I. Smith — Crustaceans of the Atlantic Coast. 
occur locally or accidentally north, and the seven southern species (3) 
which occur similarly south of Cape Cod, there are left only eleven 
species (4, 5) which can be properly regarded as common to two re- 
gions of the Xew England coast. This fairly represents, I think, 
the marked difference between the two faunae; a difference due 
principally to the difference in the temperature of the water, but 
partially undoubtedly, to the different structure of the coast and to 
the different nature of the shore and bottom in the two regions. 
That there is no similar change in the fauna of the coast and shal- 
low waters from Massachusetts Bay to Labrador is well shown by a 
comparison of the fauna of Massachusetts and Casco Bays with the 
fauna of the Gulf of St. Lawrence at similar depths. Omitting the 
southern species of lists (1,2) and also the deep-water species (8) 
which are ordinarily not found at depths less than fifty fathoms, the 
following species are left recorded from Massachusetts and Casco 
Bays ; those not yet recorded from the Gulf of St. Lawrence being 
prefixed by an asterisk : 
Cancer irroratus. 
Hippolyte Groenlandica. 
*C. borealis. 
*Pandalus borealis. 
Hyas araneus. 
P. annulicornis. 
H. coarctatus. 
Thysanopoda Norvegica. 
*Eupagurus bernhardus. 
T. inermis. 
E. pubescens. 
*Erythrops Goesii. 
E. Kroyeri. 
Meterythrops robusta. 
Homarus Americanus. 
*Mysis mixta. 
*Axius serratus. 
*M. stenolepis. 
Crangon vulgaris. 
Diastylis politus. 
C- boreas. 
D. sculptus. 
Sabinea septemcarinata. 
D. quadrispinosus. 
*Caridion Gordoni. 
*D. abbreviatus. 
Hippolyte Fabricii. 
*Leptostylis longimanus. 
H. Gaimardii. 
*Eudorella hispida. 
H. spinus. 
E. pusilla. 
*H. securifrons. 
*E. deformis. 
H. Phippsii. 
*Lamprops quadriplicata. 
H. pusiola. 
*Campylaspis rubicunda. 
H. polaris. 
This list contains all the species recorded from less than fifty fathoms 
in the Bay of Fundy (unless J Lysis oculata or Lexicon nasicoides 
may prove to be exceptions), and is, as far as known, a complete list 
of the species which should be regarded as the regular inhabitants of 
the coast region of northern Xew England. Only six species addi- 
tional to this list are recorded from the Gulf of St. Lawrence ; they 
are the following : 
