AMPHIPODA. 
221 
The species best known and tlie type of this subgenus is the 
Cancer pul ex, L . ; Sqiiilla pulex, De Geer, Insect., VII, xxxiii, 
1,2. It inhabits brooks, &c. Tlie other species are marine * * * § . 
Tlie antennae of tlie following, as in all the other Amphipoda, are 
simjile or without appendages, 
Melita, Leach. 
The second pair of feet, in the male, terminated by a large com- 
pressed forceps, the toe folding under its internal surface; the an- 
tennae, nearly equal in length ; a small foliaceous appendage on each 
side of the posterior extremity of the body f. 
M/era, Leach. 
The second feet in the males terminated as in the Melitte, but the 
toe folds under the inferior edge of the forceps and is not concealed. 
The superior antennae are longer than the inferior, and the foliace- 
ous appendages of the posterior extremity of the body are want- 
ijig t- 
Amphitiioe, Leach. 
I'he four anterior feet nearly similar in both sexes; the penultimate 
article or hand proper, ovoid , 
Pherusa, Leach. 
'I'he Pherusae only differ from the proceeding subgenus in the hand 
of the forceps, which is filiform ||. 
There, the peduncle of the antennae, is only composed of two joints, 
the third being so small as to be confounded with those of the stem, 
or forming that of the base ; the superior are longer than the inferior. 
All the feet are simple, or without forceps. Such is 
If EXAMINE, Leach^. 
In those, the moveable toe of the two forceps is bi-articulated. 
The antennae are of equal length. 
Leucotiioe, Leach. 
The antennae short, their peduncle formed of two joints ; the four 
anterior feet terminated in a stout forceps ; toes of the two first bi-ar- 
* See Desmar., Consicl., p. 20.5, 267. 
■f' Cancer pulmahis, Montag., Trans. Lin. Soc., VII, ]). 69; Encyclop. M^-thod., 
Atl.d’Hist. Nat.. CCiCXXXVI, 31 ; Dcsinar., Consid., XLV, 7. 
J Cancer (/antmarus c/rosinuiiuis. Montag., Trans. Lin., Soc., IX, iv. 5 ; Desmar. 
Consid., p. 204. 
§ Cancer rvhricafns. Montag., Trans. Lin. Soc., IX, p. 99 ; Encyclop. Mi'tliod., 
AH. d’llist. Nat., CCCXXXVI, 33 ; Desmar., Consid., XLV, 9; — Unisci's canrelliis, 
Pall., Spic. Zool. Eascic., IX, iii, 18; (iuminarus cunceUus. Fal). 
II Pherusa fusicoJa, Leacli ; Trans. Lin. Soc., XI, j). 300 ; Desmar., (Nnisid., 
p. 26S. 
f Cancer ganimarus spiiwsus, Montag., Trans. Lin. Soc., XI, )). 3 ; Desmar., 
Consid., XLV, 0. 
