PUGET SOUND CRUSTACEA. 273 



The question whether AmpJiitJioc Juinieralis may be identical 

 with some of the older species is one which it is not possible to 

 answer satisfactorily in the present state of our knowledge. Mr. 

 Stebbing (Chall. Rep. Amph., 351) compares it with Spence 

 Bate's A. falklandi {Cdii. Amph. Brit. Mus., 237, PL XLI, f 6) 

 and he afterwards (op. cit, p. 11 24) notes the resemblance be- 

 tween the latter species and Dana's A. brcvipcs (U. S. ExpL 

 Exp. Crust., II, 941, PI. 64, f 5). A. falklandi, however, dif- 

 fers, according to Spence Bate's account, from the present spe- 

 cies in the fact that the last pair of uropods project much beyond 

 the preceding, while the last two pairs of pereiopoda are said to 

 be subequal. In A. brcvipcs Dana the posterior gnathopods of 

 the male are large and quite different in shape from those of the 

 present species. 



Amphithoe sp. 



A second species of AmpJiitlioc is represented by an imperfect 

 female specimen about 18 mm. long. The coxal plates are 

 very large, about twice as deep as the corresponding segments. 

 Both pairs of antennae rather slender, upper pair half as long as 

 body, lower about two-thirds as long as upper. Flagellum 

 of lower pair about half as long as peduncle. Gnathopoda 

 stronger than in preceding species, second pair larger than first, 

 hands ovate, palm oblique and defined by a tooth. Second 

 pair of pereiopods (the first are missing) with basal joints not 

 expanded, merus not strongly arched in front. Fourth and 

 fifth pairs of pereiopods rather slender, subequal, with tufts of 

 long setae especially at tip of propodus. Body and appendages 

 sprinkled with minute reddish-brown pigment spots. 



The single mutilated specimen offers no striking characters 

 to differentiate it from several of the other and imperfectly 

 known species, and indeed in this family the distinction of 

 species in the female sex are frequently so obscure that we can- 

 non venture on a more precise determination. It may be noted, 

 however, that in general aspect and particularly in the long 

 setae of the posterior pereiopods it resembles Dana's A. Jiliconiis, 

 from Rio Janeiro, and it may not improbably be the species re- 



