INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 555 



EUDORELLA HISPIDA SlirS. 

 Loc. cit., p. 80. 

 Rare in 30 to 35 fatlioms, with the other species meutiouetl, oflf the 

 coast of New Jersey, (Sars.) 



AMPHIPODA. 



(^RCHESTIA AGiLis iSiuith, sp. iiov. Plate IV, fig. 14. (p. 314.) 



Male : Auteunuhi not quite reaching the distal extremity of the 

 peuultimate 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 i)eduncle 

 stout and swollen, the ultimate longer than the penultimate; flagellum 

 stout, compressed vertically, much shorter than the i^eduncle, composed 

 of twelve to fifteen segments. Proi^odus in the second i)air of legs 

 short and thickened laterally, the palmary margin with a small promi- 

 uence 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 b}' a small notch near the posterior angle, 

 so that the margin Avhen 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 seVce 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 setfe 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. 4GS,) 



Male : Antenuulfe reaching slightly beyond the distal extremity of 

 the penultimate segment of the peduncle of the antenute. Anteuu{e 

 less than half as long as the bod^- ; peduncle slender ; flagellum slen- 

 der, longer than the peduncle, composed of eighteen to twenty-six seg- 

 • ments. Propodus in the second pair of legs nearlj' 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 setx 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. 



