ARCTURUS LONGICORNIS. 



ISOPODA. 



NORM ALT A. 



365 



ARCTVRID^. 



ARCTURUS LONGICORNIS. 



Specific character. Moderately slender. Four anterior segments of the 

 body strongly tubereulated. Upper antennae reaching to the tip of the 

 second joint of the inferior. Flagelluru 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 lonyicornis. SOWERBY, Brit. Misc. t. 19. 



Arcturus longicornis. WESTWOOD, in Trans. Ent. Soc. Lond. 1, 72, t. 10. 



GUERIN MENEV. 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 longicornis. FLEMING, Edin. Enc. vii. p. 602. JOHNSTON, in Lou- 

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

 ix. p. 80, f. 15, young. DALYELL, Powers of 

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



Leachia tacertosa. JOHNSTON, Edinb. Phil. Journ. xiii. p. 220. 



