Rey. A. M. Norman on new Crustacea Amphipoda. 419 
three segments deep, their infero-posteal angles completely 
rounded off. A marked line of separation between third 
and fourth segments; fourth, fifth, and sixth segments almost 
coalesced, the two latter actually so; the dorsal margin ele- 
vated into three little tuberculated humps, which mark the 
three segments ; the sixth segment abruptly truncated behind, 
the telson being attached to the lower edge of the truncation. 
Telson squamitorm, semielliptical, cleft almost to the base, 
cleft linear. First wropods much longer than second, and as 
long as the last (exclusive of their sete), last having a broad 
peduncle and two widely lanceolate rami, which have their 
margins furnished with long plumose sete. The structure of 
the shell of this species consists of hexagonal cells, which are 
extremely conspicuous and remarkably regular and elegant 
on the coxe of the last pereiopods. Length scarcely a tenth 
of an inch. 
This species has never been taken with the dredge: it is a 
capital swimmer, and is procured by means of the surface-net. 
Shetland (A. M. N. and Mr. D. Robertson) ; Moray Firth 
(Mx. 'T. Edward) ; Firth of Clyde (Mr. D. Robertson). 
The characters which will enable this species to be recog- 
nized at a glance are, first, the coalesced fifth and sixth seg- 
ments of the pleon, and the remarkable posterior truncation of 
the latter; and, secondly, the form of the last pereiopods, and 
especially their elegant hexagon-celled thighs. 
Microproropus, Norman. 
Superior antenne furnished with a secondary appendage. 
First gnathopods subchelate. Second gnathopods subchelate, 
larger than the first, greatly developed in the male, but scarcely 
larger than the first in the female. Uvropods terminating in 
simple spines, those of the last pair having only a single 
ramus. Telson tubular. 
This genus is closely allied to Microdeuteropus. It differs 
from that genus inasmuch as the second gnathopods are larger 
than the first, the contrary being the case in Wicrodeuteropus— 
and in the last pair of caudal appendages, which have only 
one branch. 
Microprotopus maculatus, Norman. Pl. XXIII. figs. 7-11. 
Microprotopus maculatus, Norman, Report British Association, 1866 
(1867), Reports, p. 205. 
Male.—Eye small, round, crimson, situated on a projecting 
lobe between the bases of the two pairs of antenne. Antenne 
subequal in length; the peduncle of the superior reaches a 
little beyond the penultimate joint of the peduncle of the ¢n- 
