{555] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 261 
EUDORELLA HISPIDA Sars. 
Loe. cit., p. 80. 
Rare in 30 to 35 fathoms, with the other species mentioned, off the 
coast of New Jersey, (Sars.) 
AMPHIPODA. 
ORCHESTIA AGILIS Smith, sp. nov. Plate IV, fig. 14. (p. 314). 
Male: Antennula not quite reaching the distal extremity of the 
penultimate segment of the antenna; second and third segments of 
the peduncle about equal in length, and each slightly longer than the 
first ; flagellum about as long as the two last segments of the peduncle. 
Antenna less than half as long as the body; segments of the peduncle 
stout and swollen, the ultimate longer than the penultimate; flagellum 
stout, compressed vertically, much shorter than the peduncle, composed 
of twelve to fifteen segments. Propodus in the second pair of legs 
short and thickened laterally, the palmary margin with a small promi- 
nence on the outer edge of the posterior angle, behind which the tip of 
the dactylus closes, and along the inner edge, inside the dactylus, with ~ 
a thin ridge, which is broken by a small notch near the posterior angle, 
so that the margin when viewed laterally shows a broad lobe next the 
base of the dactylus and two small, rounded lobes next the posterior 
angle, the tip of the dactylus resting between the small lobes; dactylus 
slender, curved so as to fit closely the palmary margin, and furnished 
with very minute setz along the prehensile margin. Posterior thoracic 
legs slightly longer than the preceding; carpus in full-grown specimens 
short, much swollen, and thickened so as to be nearly cylindrical. 
Female: Carpus and hand in the second pair of legs unarmed; pro- 
podus short, slightly spatulate in outline, with a pair of minute sete at 
the base of the dactylus, which is very short, not reaching the extremity 
of the propodus. 
Length: male, 10-15™™; female, 10-14. 
Bay of Fundy to New Jersey. 
ORCHESTIA PALUSTRIS Smith, sp. nov. (p. 468.) 
Male: Antennule reaching slightly beyond the distal extremity of 
the penultimate segment of the peduncle of the antenne. Antenne 
less than half as long as the body; peduncle slender; flagellum slen- 
der, longer than the peduncle, composed of eighteen to twenty-six seg- 
ments. Propodus in the second pair of legs nearly oval in outline, the 
palmary margin spinous, regularly curved to the posterior angle, which 
projects on the outer edge in a slight, rounded prominence, within which 
the tip of the dactylus closes ; dactylus slender, curved so as to nearly 
fit the palmary margin, and furnished with minute sete along the pre- 
hensile margin. Posterior thoracic legs slightly longer than the pre- 
ceding ; carpus and propodus both long and slender. 
The female differs from the male as in the last species. 
Length, male, 15-22™™; female, 12-18"™. 
Cape Cod to New Jersey, and very likely farther north and south. 
