410 



SPH^ROMID.E. 



ISOPODA. 



NORM All A. 



SPHJEROM1DJ1. 



SPtLEROMA 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 carinse but slightly elevated ; those of the terminal segment some- 

 times interrupted, so that each forms two tubercles. 



Length, one-third of an inch. 



Spkceroma Hookeri. 



LEACH, Edinb. Enc. vii. p. 433. Trans. Linn. Soc. x. 

 p. 369. Diet. Sci. Nat. xii. p. 345. DESMAREST, 

 Cons. Crust, p. 300. MILNE EDWARDS, Crust, iii. 

 p. 206. WHITE, 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 



