. 286 T'ransactions.— Zoology. 
margins. The first gnathopoda of the male have the joints rather short 
and dilated on their lower margins; the propodos is about as broad as 
long, rounded on both margins, and with the palm nearly transverse. In 
the female the same is more slender, and the joints longer in proportion to 
their breadth ; the propodos sub-quadrate, with tho palm quite transverse ; 
and only the carpos has the rounded dilatation. The second gnathopoda 
of the male have a large, broadly-ovate propodos, narrowing to the 
extremity. It bears a double row of stiff spine-like teeth along the palm, 
which extends very obliquely more than half-way along the inferior margin. 
In the female, on the other hand, this.limb is so much reduced anteriorly 
as to suggest a close approximation to Orchestia ; the meros, carpos, and 
propodos have their inferior margins dilated into rounded plates; while the 
latter bears a minute dactylos, extending only about half-way across it, and 
not quite at its extremity. The pereiopoda increase in length posteriorly, 
the last pair being considerably the longest. Length ¿ inch. 
Loc. Numerous specimens of this species were sent me from Wel- 
lington by Mr. J. C. Gully, who obtained them in a small stream into 
which several drains ran. 
Genus Corophium, Latr. 
Latr. Gen. Crust., i., p. 58. 
Brit. Mus. Cat. Amphip. Crust., p. 279. 
1. Coroputum Excavatum, n.sp. Pl. xii., figs. 1-8. 
Cephalon laterally produced between the bases of the antenn® into small 
obtuse lobes, on which the small rounded eyes are placed ; seen from above 
the front margin is nearly straight, and is only pointed (not rostrate) be- 
tween the bases of the anterior antenne. Antenne subequal in length, 
more than one-third as long as the body: anterior pair slender; 1st and 
2nd joints of peduncle long, subequal; 8rd joint very short; flagellum 
10-jointed, as long as base: inferior pair very stout, pediform; flagellum 
very short, 6-jointed : both pairs of antenne sparingly furnished with sete. 
First pair of gnathopoda rather small; ischium and meros very short, the 
former with a long tuft of sete; carpus elongated, thickly fringed with hairs 
on its inferior margin ; propodos rather shorter than carpus, slightly dis- 
tended proximally, furnished with a tuft of sete on its upper margin and 
another at the hinge of the dactylos, palm transverse, with a fringe of fine 
sete; dactylos slightly curved, impinging closely on the palm. Second 
pair of gnathopoda longer than first, joints rather slender ; meros produced 
into a scoop-like process, fringed on each margin with long sete, and into 
which the carpus lies closely when the limb is folded; carpus elongated, 
rather widest at its distal end, densely fringed with long sets along its in- 
ferior margin ; propodos as long as carpus, sides nearly parallel, produced 
