GAMMARin.K. 195 



rather longer than half the flaj^cUuni. Inferior antennoD shorter ; 

 base shorter than base of superior pair ; flagellum ver}- short. 

 First pair of gnathopoda quite small ; propoclos oblong, hirsute 

 below, narrower at base ; propodos of second pair equal, very 

 large, subquadrate ; apex transverse, defined by a spiniforra acute 

 immoveable tooth ; palm three-dentate, teeth prominent ; dactylos 

 hardly longer than palm. Two posterior pairs of pereiopoda sub- 

 equal, the fiftli a Uttlc the shorter, the joints at their posterior 

 apices densely hirsute ; other setae short. 



" Ilah. From the coral-reefs, Feejee Islands." — Dana. 



13, Mcera tenuicornis. (Plate XXXV. fig. 6.) 

 Melita tenuicornis, Dana, U. S. Explor. Exped. p. 963. pi. GG. f. 0. 



" MaJe. — Coxa; rather broad. Antennae slender : siipcrior pair longer 

 than half the body ; base a little shorter than the flagellum ; se- 

 cond joint much the longest ; flageUum terete ; setae verticiUate, 

 slender, and slightly longer than the articuli : inferior pair a little 

 the shorter ; base much longer than flagellum, and also exceeding 

 in length the base of the sujicrior jiair ; third and fourth joints 

 subequal. Propodos of first pair of gnathopoda very small, ob- 

 ovate ; margin hirsute ; dactylos minute, and articulated to the 

 propodos below the apex. Propodos of second pair of gnathopoda 

 oblong, subeUiptical ; back much flattened, densely hirsute below ; 

 palm not excavate ; dactylos rather large. First and second pairs 

 of pereiopoda short ; thi-ee posterior pairs subequal ; the fourth 

 pair a little the smallest ; setae short. 



" Female? — Setae of antennae very nearly at right angles with the 

 joints. Propodos of second pair of gnathopoda of moderate size, 

 long obovate, apex sparingly oblique ; dactylos short, shutting 

 against lateral surface of propodos. 8tylets of penultimate pair of 

 pleopoda short ; posterior pair long, simple, the branch subcylin- 

 drical and furnished with short setae. 



" Length of the male 4^ Lines, of the female ? 4 lines. 



" Hah. Bay of Islands, New Zealand ; found along the shores 

 between low- and high-water level." — Dana. 



Authors have described this species and M. Fresnelli as having 

 no secondar)^ appendage to the superior antennae, in which case a 

 new genus mu.st be formed to receive them, — a responsibihty that I 

 do not like to take upon myself without seeing the animals, knowing 

 how difficult it is at all times to observe the secondaiy appendage of 

 the supi'rior antennae, owing to its occasional minuteness, or perhaps 

 accidental loss. 



o2 



