GAMMAUID^. 181 



body ; base a little shorter tlum tliigoUum ; flagollum oonsistinp; of 

 numerous short, transverse artiiuli ; seta; many, as lojig as diameter 

 of artieidi ; sccondaiy appendage very small and short : inferior 

 pail- hut little lunger than base of superior; flagcUum but little 

 longer than half the base. First pair of gnathopoda quite small ; 

 propodos subovate, hirsute below ; carpus not shorter. Second 

 pail' of gnathopoda veiy stout ; ])ropodos large, subovate, arcuate 

 below, and densely furuishecl with long- slender hairs ; palm not 

 excavate nor defined. Setae of pcrei<?poda short, about half as long 

 as width of propoda, rather numerous. Three posterior pairs of 

 pleopoda subequal. 



" Female. — Gnathopoda small ; propodos of second pair a little the 

 larger, subovate, hirsute below ; carpus hai-dly oblong ; mcros 

 rectangular below. 



" Length 4 lines. 



" JIab. Rio Janeii'o, Brazil."' — Dana. 



3. Gammarella pubescens. (Plate XXXIII. fig. 1.) 

 Gammarus ? pubescens, Dana, U. S. Explor. Exped. p. 960. pi. 66. f. 3. 



" Body compressed, sparsely pubescent ; coxae large. Telson small, 

 emarginate. Superior antennae nearly three-fourths the length of 

 the body, and almost twice as long as the inferior ; base hardly 

 shorter than the flagellum ; fii'st and second joints subequal, long ; 

 sette numerous, longish. Inferior antennae densely hirsute ; base 

 much longer than flagellum, and shorter than base of superior. 

 First pair of gnathopoda small ; propodos narrow, nearly straight 

 above, narrowing towards the apex, hirsute below. Propodos of 

 second pair of gnathopoda oblong, large, of same form as propodos 

 of first pair, hirsute below, palm nearly the length of tho- inferior 

 margin. Thi'ee posteiior pairs of pcreiopoda rather long, subequal ; 

 setae rigid, basa broad. 



'' Length 4 Lines. 



" Hah. Coral reef of Pitt's Island (the northern of the Kings- 

 mills). CoUected AprH 30, 1841."— Z)an«. 



59. MELITA. 



Melita, Leach, Edinh. Encijc. art. Crust, p. 403, Sf- Append, p. 432 ; 

 Trans. Linn. Soc. xi. p. 358. 



Dcmnarcst, Consid. sur les Crust, p. 265. 

 (Nut Dana.) 

 Ceradocus, Costa, Rend, delta Heale Accad. delle Scienze di Napoli^ 



185.3, p. 170. 

 Mtera, Dana, U. S. Explor. Exped. p. 965. 



Eyes round. Superior antenna) appendiculate. Inferior autcnme 



