Gammarids from New Zealand, 449 
scattered minute spines on its outer surface; the distal end 
of the joint is transverse; behind the articulation of the 
dactylos is an acute tooth, followed by a large rounded pro- 
tuberance at the joint; palm furnished with one very large 
powerful conical tooth, followed by a deep indentation, while 
the postero-inferior extremity of the palm is occupied by a 
square tooth, the top of which occupies more than a third of 
the length of the whole palm; dactylos strong, slightly 
curved, reaching a little beyond the end of the palin. 
First and second pertopods slender ; third stout; fourth and 
fifth increasing in length posteriorly, rather slender and 
spinously setose. 
Pleopoda well developed. 
First uropods the longest; basal portion carrying five 
spines, which increase in length outwards, on the inner margin, 
and five or six very short ones on the outer; between the 
branches is a large acute spine; branches subequal, shorter 
than the basal portion, furnished with a few spines. 
Second uropods with only two or three spines on each side 
of the base; inner branch about subequal with the base, 
somewhat longer than the outer, both spinose. 
Third uropods shortest ; branches subequal, slightly shorter 
than the base, spinose. 
Telson subquadrate, the sides converging posteriorly, deeply 
cleft, each extremity bearing one spine-like seta. 
Length 4-4°5 millim.; depth of body about one fifth of 
the length. 
Hab. Taken with the dredge in about 8 fathoms in the 
Bay of Islands. 
Mera Haswelli*, sp. n. (Pl. X. tigs. 6-10.) 
Body slender and compressed. 
Cephalon produced at the sides into an acute angle between 
the bases of the first and second pairs of antenna, not rostrate 
above. 
Eyes with about eighty to ninety ocelli, produced well 
forward on the sides of the cephalon. 
First antenne with the first and second joints very short 
and almost merged into the front of the cephalon; third joint 
more than twice as long as broad, almost destitute of sete. 
The three joints together are not more than two thirds as 
long as the cephalon ; fourth joint slender, nearly twice as 
long as the third, with a few long sete on the lower margin ; 
fifth joint only about half as long as the fourth, also sparingly 
* Named in honour of Prof. Haswell, F,R.S., of Sydney University. 
