No. 26.] ARTHROSTRACA OF CONNECTICUT. 149 



yond the palm. Second gnathopods very strong; carpus sub- 

 triangular, much shorter than propodus which is oblong and 

 broader than in first pair, and slightly broader distally than 

 proximally, front and hind margins setose, palm oblique and con- 

 cave, with prehensile angle prominent. Gnathopods in female 

 comparatively small ; first pair with propodus oblong and longer 

 than carpus, and palm oblique and rounded behind where it is 

 armed with a strong spine; dactyl projecting beyond palm but 

 not nearly so far as in the male. Second gnathopods with carpus 

 produced behind into a narrow lobe which is setose distally ; pro- 

 podus oblong, shorter and broader than in first pair, palm oblique, 

 prehensile angle rather prominent and armed with a stout spine. 



Terminal uropods with outer ramus shorter than inner, and 

 armed apically with two hooked spines; rami less than half as 

 long as peduncle. 



Color bright green, pale green, bluish ; nearly colorless to 

 dark reddish brown. 



Length 9 mm. 



Distribution: Provincetown (Rathbun), Woods Hole, Vine- 

 yard Sound, New Jersey ; Noank Harbor, north of Fishers Island, 

 Long Island Sound. 



The species is not uncommon among seaweed near shore and 

 in sheltered places, and has been taken at the surface in the 

 tow-net at Woods Hole and Noank. It is not common on eel- 

 grass near the roots but seems to prefer the masses of eel-grass 

 nearer the surface. 



Professor Holmes has described the habits and natural his- 

 tory of the species fully in the Biological Bulletin, vol. 2, p. 165- 

 193, to which the reader is referred for details. 



Amphithoe rubricata (Montagu). 



1808. Cancer Gammarus rubricatus, Montagu, Trans. Linn. 

 Soc. Lond., vol. 9, p. 99, pi. 5, fig. i. 



1853. Amphithoe maculata, Stimpson, Smithson. Contrib. 

 KnowL, vol. 6, p. 53. 



1874. Amphithoe valida, Smith, Kept. U. S. Com. Fish., 

 1871-2, p. 563. 



Body stout, robust; interantennal lobes blunt. Eyes small, 

 round or oval. 



