ISOPODA. 



NORM ALU. 



ARCTURUS LONGICORNIS. 



365 



ARCTVRID^. 



ARCTURUS LONGICORNIS. 



Specific character. Moderately slender. Four anterior segments of the 

 Lody strongly tuberculated . Upper antennre reaching to the tip of tlie 

 second joint of the inferior. Flagelluni longer than the two preceding joints 

 together. Second, third, and fourth segments dilated over the place of in- 

 sertion of the legs. 



Length of the body, one inch. 



Oniscus longirornis. Sowerby, Brit. Misc. t. 19. 



Airtiu'us lonyicornis. Westwood, in Trans. Ent. Soc. Loud. 1, 72, t. 1(3 

 GuKRiN Mknev. Icon. R. An. Crust, t. 31, f. 2 

 Milne Edwards, Crust, iii. p. 124. White, Cat 

 Brit. Crust, Brit. Mus. p. 63. Pop. Hist. Brit 

 Crust, p. 221, pi. xii. f. 1. Gosse, Man. Mar 

 Zool. 1, fig. 249. 



Astacilla longico'i-nis. Fleming, Edin. Enc. vii. p. 502. Johnston, in Lou 

 don's Mag. Nat. Hist. viii. p. 494, f. 44, adult 

 ix. p. 80, f. 15, young. Dalyell, Powei's of 

 Creator, 1, p. 226, pi. Ixiii. figs. 1 — 4. 



Leachia lacirtom. Johnston, Edinb. Phil. Journ. xiii. p. 220. 



