INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 563 



color extending down upon the epirnera, while the legs and caudal ap- 

 pendages are semi-translucent. The eyes are large and black. 



Amphithoe maculata Stimpson. Plate IV, fig. 16. (p. 315.) 



Marine Invertebrata of Grand Manan, p. 53, 1853.- 



Vineyard Sound to the Bay of Fundy and Labrador. 



Amphithoe valida Smith, sp. nov. (p. 315.) 



. Male : Eyes round, black in alcoholic specimens. Antennulre and 

 antennre subequal in length. Peduncle of the antennula extending 

 scarcely beyond the distal extremity of penultimate segment of the 

 peduncle of the antenna ; the second segment but little longer than the 

 first; ultimate segment short and slender. Ultimate and penultimate 

 segments of the peduncle of the antenna subequal in length. First 

 pair of legs short, compressed ; carpus as broad as the propodus ; pro- 

 podus broad, oval in outline, the posterior and palmary margins forming 

 a continuous, nearly semicircular curve; dactylus fitting closely the pal- 

 mary margin. Second pair of legs very large; carpus small; j)ropodus 

 oblong, broadest at the distal extremity, very large and thickened, the 

 outer surface convex, the inner flattened, palmary margin transverse, 

 with a broad, low, median tooth, and "a rounded prominence at the in- 

 ferior angle, within which the tip of the very stout and strongly curved 

 dactylus closes. 



The female differs in having the hands of the first pair of legs slightly 

 more elongated, and those of the second pair smaller than in the male, 

 and the palmary margin slightly oblique. 



Color in life, bright green. 



Length, 10-13 mm . 



Xew Jersey and Long Island Sound. 



Amphithoe longimana Smith, sp, nov. (p. 370.) 



Male : Eyes round, and, in specimens preserved in alcohol, black. 

 Antennula slender and as long as the body; second segment of the 

 peduncle a little longer than the first; third segment about half as 

 long as the second; flagellum about twice as long as the peduncle. An- 

 tenna considerably stouter and slightly shorter than the antennula, the 

 peduncle about twice as long as the flagellum ; third segment of the 

 peduncle a little more than half as long as the first segment of the pe- 

 duncle of the antennula; fourth segment nearly three times as long as 

 the third ; fifth considerably longer than the fourth ; flagellum a little 

 longer, or sometimes only as long, as the fifth segment of the peduncle. 

 Hands of the first and second pairs of legs stout and much elongated. 

 Carpus in the first pair nearly as long as the first segment of the pedun- 

 cle of the antennula, narrow; propodus much more than twice as long 

 as broad, as wide and long as the carpus, of the same width throughout, 

 slightly curved, and the very short palmary margin transverse ; dacty- 

 lus stout, very little curved, more than half as long as the propodus, 

 and projecting far beyond its inferior edge; the posterior margins of 



