6 On new Species of Crustacea from New Zealand. 



Fam. Corophiidae. 



Genus COROPHIUM, Latr. 



Corophium co?itractum 7 Stimpson. 



I obtained two specimens of this species by the dredge in 

 Dunedin Harbour ; and its occurrence in this habitat is inter- 

 esting, as it was originally described from Japan. The 

 description given in the Brit. Mus. Cat. p. 282, which is 

 evidently copied from that given by Stimpson himself, is so 

 meagre, that I have drawn up the following from my speci- 

 mens, both of which were adult females. 



Body much broader than deep. Eyes small. Superior 

 antenna? rather shorter than inferior ; first joint stout, pro- 

 duced on its inferior inner margin into two stout teeth; second 

 equal to it in length, slender ; third much shorter ; flagellum 

 five-jointed, terminated by a bunch of setae. Inferior antennae 

 very strong, about one fourth as long as the animal, with a 

 few strong teeth on their inferior margins on the inside. 

 First gnathopocla small ; basos with two long setae ; ischium, 

 meros, and carpus fringed with long setae ; propodos rounded 

 towards the extremity, with a convex palm fringed with short 

 hairs ; dactylos curved, as long as the palm. Second gna- 

 thopocla larger than first ; carpus widely convex on its infe- 

 rior margin, and, together with the more slender propodos, 

 bearing fringes of long setae ; dactylos four-toothed at the 

 extremity of its lower margin. First four pairs of pereiopoda 

 diminishing in length posteriorly, but with the basa progres- 

 sively widening. Fifth pair very long; basos dilated, fringed 

 with long setae, which are simple on the anterior, and plumose 

 on the posterior margin. Three anterior pairs of pleopoda 

 short and double-branched ; three posterior pairs very short, 

 the last pair reaching slightly beyond the telson, flattened, 

 rounded, thickly covered with short hairs, and bearing a few 

 long setae. Telson broadly triangular, notched at the apex. 

 Length 0*14 inch. 



Otago Institute, Dunedin, 

 Feb. 10, 1880. 



EXPLANATION OF PLATE I. 



Fig. 1. Paratanais tenuis, x 26. a, first pereiopod, X 90; b, second 

 pereiopod, X 90. 



Fig. 2. Panoploea spinosa, X 10. a, first gnatliopod, X 28 ; b, second 

 gnathopod, X 28 ; c, telson, X 28. 



Fig. 3. Panoploea debilis, X 10. a, telson and pleopoda, X 15. 



Fig. 4. Amphilochus squamosus, X 14. a, first gnathopod, X 60. 



Fig. 5. Megamcera fasciculate, a, first gnatliopod, X 26; b, second gna- 

 thopod, X 26 ; c, posterior pleopoda and telson, x 13 ; d, telson 

 (from above), x 20. 



