S. I. Smith — Crustaceans of the Atlantic Coast. 
37 
tom of the same character. Four other specimens (/'), two males 
ancl two females, one of which was carrying eggs, were dredged near 
these localities, August 31, 1878, latitude 42° 33', longitude 69° 35', 
in 100 to 115 fathoms, mud and stones. Fragments of a large speci- 
men were also found in the stomach of a cod-fish taken in ninety-eight 
fathoms, soft mud, fourteen miles southeast of Cape Ann, September 
2, 1878. 
The G. tridens was described by Kroyer (Naturhistorisk Tidsskrift, 
i, p. 10, pi. 1 , 1836) from specimens taken on the coast of Denmark. 
It has since been reported from Christiania Fiord, in ten to twenty 
fathoms (G. O. Sars, Christiana Videnskabs-Selskabs Forhandlinger 
for 1873, p. 393) and a few other Scandinavian localities, and from 
off Velentia, Ireland, in 159 fathoms (Thomson, “ Depths of the Sea,” 
p. 87, fig. 9, 1873). Like its American representative, it seems to be 
a deep-water species rarely taken in the dredge. 
Panopens depressns Smith. 
Provincetown ! (1872), Massachusetts, to the Gulf of Mexico! 
(Col. E. Jewett, et ah). This and the next species are apparently 
regular inhabitants of Cape Cod Bay. They are both, but more 
particularly this species, very abundant upon oyster-beds everywhere 
south of Cape Cod and are often carried alive long distances among 
oysters, so that it is difficult to determine their exact northern range. 
Panopens Sayi Smith. 
Provincetown ! (1872), Massachusetts, to the Gulf of Mexico! (Col. 
E. Jewett). Apparently less abundant, at least on the New England 
coast, than the last. 
Panopens Harrisii Stimpson ex Gould. 
Massachusetts Bay! (Coll. Boston Soc. Nat. Ilist.) and Long Island 
Sound ! to St. John’s River, Florida ! (G. Brown Goode). This 
species, originally described by Gould, from Charles River, Massa- 
chusetts, is apparently a thoroughly brackish-water form. The 
specimens from the St. John’s River, as I am informed by Mr. 
Goode, were taken at Arlington Bluffs, twenty-two miles from the 
mouth. It was associated . at this place with Sesarma cineria, Palm- 
rnonetes vulgaris , and a Bopyrus which infested the branchial cavity 
of nearly every specimen of the latter species. Mr. Goode writes 
that these species were taken in water perfectly fresh to the taste, 
though brackish water is sometimes driven by the wind up the river 
to where they occurred. 
