Rev. A. M. Norman’s Notes on British Amphipoda. 123 
Megaluropus agilis, Norman. 
(Pl. X. figs. 15-17.) 
1889, Megaluropus agilis, Norman, Ann. & Mag. Nat. Hist. ser. 6, 
vol. ili. p. 446, pl. xviil. figs. 1-10; Hoek, Crustacea Neerlandica, 
Tidschrift der Nederlandsche Dierkundige Vereeniging, 2de Reeks, 
Dec. ii. p. 28, pl. vii. fig. 7, pl. viii. fig. 3, pl. ix. fig. 3. 
Distribution. Holland (Hoek). 
Female-—The second gnathopod of the female is well 
figured by Hoek. It is not ovate, as in the male, but nar- 
row and not more than half the breadth of the wrist, widest 
and slightly angled below at half its length. 
Male.—The figure given by me of the second gnathopod 
represents that of the male. ‘The eye is considerably larger 
than in the female and passes upwards behind the base of the 
antennules. Antennules and antennz longer, the two basal 
joints of the former and the three distal joints of the peduncle 
of the latter hirsute, with short stiff sete. Antennules 
shorter than peduncle of antenna, second joint longer than 
the first, third very short, subequal to first joint of flagellum ; 
flagellum consisting of eight articulations, without calceola, 
but each articulation furnished with one of the long strap- 
formed membranaceous appendages or “ olfactory papille ” 
often met with in this situation; secondary appendage two- 
jointed, about as long as the first articulation of the flagellum. 
Antenne with third and fourth joints stout and the latter and 
the fifth joint very long and subequal; flagellum of sixteen 
very long and slender articulations, without calceola or strap- 
shaped appendages. 
Genus IV. ELAsmopus, Costa, 1853. 
Mandibles with third joint of palpus much larger than the 
second, curved and very setose. Second maxille having the 
inner lamina ovate, ending in seta. Antennules longer than 
antennz, the peduncle elongated. Second gnathopods longer 
than the first. Peraopods of last three pairs with the joints 
very broad and outspread. Uropods of last pair with branches 
of equal length and broad. Tedson deeply cleft. 
The chief points by which this genus is distinguished from 
Mera are the very broad joints of the pereopods, and the 
branches of the last uropods being short, equal, and abruptly 
truncated apically. 
