SPHAROMA SERRATUM. 405 
ISOPODA. SPH #HROMIDA. 
NORMALIA. 

SPHHROMA SERRATUM. 
Specific character.—Smooth, oval, very convex; pleon rounded at the 
extremity, which is entire ; outer division of the terminal appendages of the 
pleon slightly serrated, extending as far back as the extremity of the last 
segment. 
Length, about half an inch. 
Oniscus serratus. Fasricius, Mant. Inst. 1, p. 242. 
Cymothoa serratum, Fapricrus, Ent. Syst. ii. p. 510. 
Spheroma serrata. Leacu, Edinb. Enc. vii. p. 405. Suppl. Enc. Brit, 
1427. Trans. Linn. Soc. xi. p. 368. Dict. 
des Sci. Nat. xii. p. 346. Samovrtin, Ent. Com- 
pend. p. 108. Dersmarxst, Cons. Crust. p. 301, 
t. 47, f. 3. Larrerin, Ency. Méth. x. p. 458. 
Guirin Ménev., Icon. R. An. Crust. t. 30, f. 1. 
Minne Epwarps, Crust. iii. p. 205, t. 31, f. 11. 
Wuire, B. M. Cat. Brit. Crust. p. 75. Pop. Hist. 
Brit. Crust. p. 245, pl. xiii. f. 6. GossE, Man. 
Mar. Zool. i. f. 235. 
