410 SPH EROMIDA. 
ISOPODA. SPH HROMIDA. 
NORMALIA, 

SPHHROMA HOOKERI, 
Specific character. Upper surface nearly smooth ; terminal segment of the 
pleon rounded at its extremity; the two last segments of the pleon bicari- 
nated ; the carinz but slightly elevated ; those of the terminal segment some- 
times interrupted, so that each forms two tubercles. 
Length, one-third of an inch. 
Spheroma Hookeri. Leacu, Edinb. Ene. vii. p. 433, Trans. Linn. Soc. x. 
p. 869. Dict. Sci. Nat. xii. p. 345. DEsmaxkust, 
Cons. Crust. p. 300. Minne Epwarps, Crust. iii. 
p. 206. Wutrs, B. M. Cat. Brit. Crust. p. 76. Pop. 
Hist. Brit. Crust. p. 245. 
THIs species was found by the late Sir William Hooker 
on the coast of Suffolk, and was described by Dr. Leach 
(to whom it had been sent, together with his entire col- 
lection of crustacea, by that gentleman), as being ashy- 
grey or reddish coloured, dotted with black points; the 
antennae ashy. In one individual the ‘small posterior 
ventral plate” had its extremity slightly serrated, and the 
