Boone, Crustacea, Cruise of "Alva," 1931 57 



thirds of this striated region there are also fine setae. The uro- 

 pod peduncle is small, calcareous, with three distal denticles, the 

 median of which is the larger. The outer and inner blades are 

 subequal, lobate, broadly rounded, almost truncate distally, with 

 the proximal portion calcareous, the distal soft and striated like 

 that of the telson. 



The five pairs of legs are monodactyl, nearly equal, slender, 

 laterally compressed, with strong curved dactyli. The fifth pair 

 of legs differs from the preceding pairs in that the ischial joint 

 has a strong acute spine at the hinder distal angle and has the 

 paired male orfices in the ventral surface of the coxal joints. 

 The sternal plastron is a narrowed shield with a deep trans- 

 verse pit or sulcus between the bases of the fourth and fifth pairs 

 of legs and with a small median nodule in the median line between 

 the bases of the fourth and third pairs of legs, also a similar nodule 

 between the second and third pairs of legs. 



Colour : The living specimen has been described as "yellow or 

 smoky yellow clouded with smoky brown, and some spots of car- 

 mine ; around the eye, carmine. Last abdominal segment, deep 

 ochre-yellow and short hirsute." (Dana) . 



References : Scyllarus antarticus, Lund, N. T., Skrivter af Na- 

 turhist.-Selsk, Kj<^benhavn, Bd. II, heft 2, 1793, p. 22. 



Cancer (Astacus) ursus major, Herbst, J., Naturg. Krabben u. 

 Krebse, Bd. II, 1793, p. 82, taf. 30, fig. 2. 



Ibaccus antarticiLs, Edwards, H. M., Hist. Nat. Crust., t. II, 1837, 

 p. 287.— Dana, J. D., Rept. U. S. Explor. Exped. Crust., vol. 

 XIII, pt. 1, 1852, p. 517. 



Parribacus antarticus, Dana, J. D., op. cit., p. 517, Atlas, 1855, 

 pi. 23, fig. 6. — MiERS, E. J., Proc. Zool. Soc. London, 1877, p. 

 138; Ann. Mag. Nat. Hist., ser. 5, vol. V, 1880, p. 378.— HaS- 

 WELL, W. A., Catal. Australian Stalk and Sessile-eyed Crust., 

 1882, p. 169.— Ortmann, A., Zool. Jahrb. Syst., Bd. VI, 1892, 

 p. 45. 



Parribaccus antarticus, Borradaile, L. A., Proc. Zool. Soc. Lon- 

 don, 1898, p. 1014 ; in Dr. Willey's Zool. Results to N. Britain, 

 N. Guinea, Loyalty Is)es and Elsewhere, pt. IV, 1900, 

 p. 419. — Whitelegge, T., Mem. Austral. Mus. Sydney, vol. 

 V, 1897, p. 146.— Lenz, H., Zool. Jahrb. Syst., Bd. XIV, 1900- 

 01, p. 441. — NoBiLi, G., Ann. Mus. Storia Nat. Genova, ser. 



