S. I. Smith — Crustaceans of the Atlantic Coast. 
129 
Nectocrangon lar. 
Hippolyte macilenta. 
Pseudomma truncatum. 
Myais oculata. (7.) 
Diastylis Rathki. 
Leucon nasicoides. 
With the exception of the new species of Pseudomma , these are all 
thoroughly arctic species, and show a slight increase in the arctic 
character of the fauna of the Gulf of St. Lawrence over that of 
northern New England. The Nectocrangon , the Hippolyte , and the 
Diastylis were found also upon the Atlantic coast of Nova Scotia 
and may, very likely, yet he found on the New England coast; while 
the Leucon is already known from the Bay of Eundy and will doubt- 
less yet be found in Casco and Massachusetts Bays. 
The fifteen species from Massachusetts and Casco Bays (6) not yet 
recorded from the Gulf of St. Lawrence afford very little evidence in 
regard to the relations of the fauna of the Gulf, for some of them 
are known to be arctic and will undoubtedly be found in the Gulf, and 
the distribution of most of the others is not sufficiently well .ascer- 
tained to be used as evidence. The absence of Eupagurus bernhardus 
from the Gulf of St. Lawrence and Greenland, while it occurs on the 
New England coast, in Europe, and in the North Pacific is, however, 
an interesting fact which should not be overlooked. 
The shallow southwestern part of the Gulf of St. Lawrence, in- 
cluding the region of Northumberland Straits, etc., as shown partic- 
ularly by its Molluscan fauna, is much more southern in its character 
than the rest of the Gulf ; but too little is known of the stalk-eyed 
crustaceans of this region to illustrate the fact, or to affect the state- 
ments above made in regard to the fauna of the Gulf as a whole, for 
the species which are recorded from this part of the Gulf only are 
all Cumacea of which the distribution is not sufficiently known to 
make their occurrence here evidence in regard to the character of 
the fauna. 
The deep-water species, or those which have not been recorded 
from less than fifty fathoms on our coast, and which are not inserted 
in lists (0, 7), are the following; those known from the Gulf of 
Maine, from off the coast of Nova Scotia, etc., being indicated by an 
m ; those from the Gulf of St. Lawrence, by an l: 
M Geryon quinquedens. 
M L Chionceeetes opilio. 
m L Lithodes maia. 
M ParapaguniB pilosimanus. 
L Munidopsis cnrvirostra. 
l Paloearis Macandrefe. 
M Sabinea Sarsii. 
Trash. Conn. Acad., Voi,. V. 
M Pasiphad tarda. (8.) 
M Pontophilus Norvegicus. 
m l Pseudomma roseum. 
M L Diastylis luciferus. 
m Leptostylis ampulaceus. 
M i. Leucon nasicus. 
m i. Kudorella einarginatn. 
17 
May, 1879. 
