304 BULLETIN OF THE 
Our species was properly placed in the genus Paleemonetes by Stimpson 
in 1871.* 1 
A figure of the adult, by J. H. Emerton, is given on Plate II. of 
Verrill and Smith’s “ Report upon the Invertebrate Animals of Vine- 
yard Sound and the Adjacent Waters,” and on page 235 of the same 
work is a description of the first larval stage by Smith.t 
This species is common in shallow water along the eastern coast of 
the United States from Hampton, N. H. (! Coll. Mus. Comp. Zoúl.), to 
the St. John’s River, Fla. (G. Brown Goode). It is especially common on 
sandy bottoms among the eel-grass, where, as Verrill well observes, its 
color admirably adapts it for concealment.{ It ascends far up into the 
brackish water of estuaries and rivers. I have found it abundant in 
the Charles River marshes, Cambridge, Mass., and Mr. G. Brown Goode 
collected it in the St. John’s River, Fla., twenty-two miles from the 
mouth, where the water was perfectly fresh to the taste.$ On the 
coast of New Jersey and the Carolinas it is associated with a nearly 
allied species, Paleemonetes Carolinus Stimpson.|| It is represented in 
the fresh waters by a smaller and slenderer species, Palcemonetes ۵ 
Stimpson, Il which has a wide distribution in the rivers and lakes of the 
Western and Southern States. 
* Notes on North American Crustacea in the Museum of the Smithsonian Insti- 
tution, No. III. Ann. Lyc. Nat. Hist. N. Y., Vol. X. p. 129. 1871. 
t Report on the Condition of the Sea Fisheries of the South Coast of New England 
in 1871 and 1872, p. 529, Pl. IT. Fig. 9. 1873. The description of the larva also 
appears in Smith's “Early Stages of the American Lobster (Homarus Americanus 
Edwards).” Trans. Conn. Acad., Vol. II. p. 377. 1878. 
t Op. cit., p. 479. 
8 Vide S. Y. Smith's ““Stalk-eyed Crustaceans of the Atlantic Coast of North 
America north of Cape Cod.” Trans. Conn. Acad. Arts and Sci., Vol. V. p. 37. 
1879. 
| Op. cit., p. 129. 
T Op. cit., p. 190. This is probably the species described, from imperfect speci- 
mens, under the name of Hippolyte paludosa, by Gibbes, in 1850 (On the Carei- 
nological Collections of the Cabinets of Natural History in the United States, Proc. 
Amer. Ass, Adv. Sci., 1850, p. 197), as claimed by Kingsley (Notes on the North 
American Caridea in the Museum of the Peabody Academy of Science at Salem, 
Mass. Proc. Acad. Nat. Sci. Phila., 1878, p. 97). 
I observe in an ovigerous female of this species from Kentucky, preserved in alco- 
hol, that the eggs are much larger in size and fewer in number than those of Palæ- 
monetes vulgaris. While the eggs of the latter, shortly after laying, measure about 
.5 mm. in long diameter, those of the former (the embryo has seemingly hardly 
begun to form) measure 1.25 mm. in length. Whether the fresh-water Palcmonetes 
hatches from the egg in a more advanced phase of development than its marine rela- 
