Gammarids from New Zealand. 447 
second pair of gnathopods, I deferred publishing a descrip- 
tion of them in the hope that I should find and recognize the 
female forms among the abundant material since “obtained 
from many parts of the colony. This I have not yet suc- 
ceeded in doing. It is, of course, perfectly possible that [ 
have passed them over without recognizing them, having 
referred them to other species. ‘he males are unmistakable. 
Of Mera Chiltont six specimens were taken, and of M. Has- 
welli four; but all are extremely fragile in structure and all 
are so much mutilated that in regard to certain limbs the 
structure has been but imperfectly made out. 
Mera Chiltont*, sp.n. (Pl. X. figs. 1-5.) 
Body slender, rather compressed ; pleon well developed. 
Cephalon produced forward below the articulation of the 
superior antenne into an obtusely pointed lobe on each side. 
The eyes, which are subreniform in shape, but broader in the 
lower than in the upper part, and are formed of numerous 
ocelli, occupy the greater portion of this lobe, and are placed 
close up to its anterior margin. 
First antenne.—First joint of peduncle stout, half as long 
as the cephalon, with a few sete on the sides and at the 
extremity ; second joint about twice as long, much more 
slender, and with six or seven tufts of sete on the lower 
margin ; third about two thirds as long as second, with a few 
tufts of sete. 
Flagellum lost; secondary flagellum (also lost) nearly 
long as last joint of peduncle. 
Second antenne somewhat longer than cephalon and the 
three first thoracic segments; peduncle subequal in length 
with that of the first antenne; first joint short, second and 
third subequal, nearly twice as long as the first, and with a 
few tufts of sete on the lower margin; flagellum slightly 
longer than last joint of peduncle f. 
Mundibles subquadrate ; left with the cutting-plate pro- 
duced almost at right angles to the basal portion ~ into a stout 
two-lobed tooth, secondary plate shorter and two-toothed, spine- 
row reaching back almost to the molar tubercle, with about 
six curved spines; right (not satisfactorily made out) with 
secondary plate well developed, broadening upwards and 
ending in about four deep indentations ; palp “with the second 
* Named in honour of Dr. Charles Chilton, F.L.S. 
+ Owing to an accident many of the smaller parts of the animal were 
lost after dissection ; hence the imperfection of the description in several 
places. 
