ISO POD A. 



NORMALIA. 



SPHJiROMA SERRATUM. 405 



SPH/EROMIDJR. 



SPH^ROMA SERRATUM. 



Specific character. • — Smootli, oval, very convex ; pleon rounded ut 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. Fabricius, Mant. Inst. 1, p. 242. 



Cymothoa sen-atum. Fabricius, Ent. Syst. ii. p. 510. 



Sjjh<xroma serraia. Leach, Edinb. Ene. vii. p. 405. Suppl. Enc. Brit. 



1427. Trans. Linn. Soc. xi. p. 368. Diet. 



des Sci. Nat. xii. p. 346. Samouelle, Ent. Com- 



pend. p. 108. Desjiarest, Cons. Crust, p. 301, 



t. 47, f. 3. Latreille, Ency. Meth. x. p. 458. 



GuERiN Menev., Icon. R. An. Crust, t. 30, f. 1. 



Milne Edwards, Crust, iii. p. 205, t. 31, f. 11. 



White, B. M. Cat. Brit. Crust, p. 75. Pop. Hist. 



Brit. Crust, p. 246, pi. xiii. f. 6. Gosse, Man. 



Mar. Zool. i. f. 235. 



