28 S. I. Smith — Crustaceans of the Atlantic Coast. 
on the writings of other observers, or whether the author has merely 
conjectured that the species — perhaps never seen by him — inhabits 
certain regions. Heretofore my own practice has not always been 
free from fault in this respect, but throughout the following pages I 
have been careful to indicate distinctly what portions of the state- 
ments are based on my own observations and what are merely copied. 
To do this in the paragraphs devoted to the geographical distribu- 
tion of the species, I have used the mark of affirmation (!) after each 
region from or in which I have examined specimens; but to avoid 
the too frequent repetition of this mark, in cases where the enumera- 
tion of several stations or depths immediately follows the name of 
a special region or locality, it has been placed after the latter only, it 
being understood that I have examined specimens from all the sta- 
tions or depths mentioned under that region or locality. The name 
of the collector, or of the authority for the locality of the specimens 
examiued, — unless I have myself been collector or observer, — is either 
inserted in parenthesis after the locality or indicated by the date, as 
explained below. The authorities for all localities from which I have 
not examined specimens are similarly indicated in parentheses. In 
the synonymy, all the references given have been made by direct 
examination of the works quoted, unless specially indicated to the 
contrary by the use of quotation marks. 
To avoid the repetition of the names of collectors, after the numer- 
ous localities on our coast, mentioned under the geographical distri- 
bution of the species, the year in which the collections were made is, 
in most cases, alone inserted ; and a short statement of the principal 
sources whence the collections have been received, is inserted here, 
that portion which is subsequently referred to as authority for col- 
lections being arranged chronologically. 
1864. Collections made at Eastport, Maine, on the Bay of Fundy, 
during September and October, by Professor Yerrill and the writer. 
1868. At the same locality, during August and the early part of 
September*, also at the Island of Grand Menan and in the deep 
waters off Eastport ; by Prof. Yerrill, Prof. H. E. Webster, Rev. 
Geo. A. Jackson, and the writer. 
1870. At the same localities and during the same season as in 
1868 ; by Professor Yerrill and Mr. Oscar Harger. Also, by myself 
upon the southern side of Long Island, during August and the early 
part of September. 
1871. Professors Yerrill and J. E. Todd, and the writer made col- 
lections, for a short time in April, in the neighborhood of Great Egg 
