OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 267 



Plagusia capensis, de Haan. 



Plate XXVIc. 



1835. Plagusia capensis, de Haan, Crust. Japon., decas 2, pp. 31, 58. 



1837. Plagusia tomentosa, Milne-Edwards, Hist. Nat. Crust., vol. ii. p. 92. 



1905. Plagusia capensis, Stebbing, Marine Invest. S. Afr. Crust., part iii. p. 47. 



1910. Plagusia chabrus, Rathbun, Pr. U.S. Mus., vol. xxxviii. pp. 591, 616. 

 1910. ,, ,, Stebbing, Ann. S. Afr. Mus., vol. vi. part iv. p. 322. 



The reasons which I gave in 1905 for upholding the name given by de Haan to 

 this species still seem to me valid, while its identification with the obscurely described 

 Cancer chabrus of Linn^us appears to be quite arbitrary. 



Locality. — Saldanha Bay, Station 483 ; and at the coaling jetty, Cape Town 



docks, Station 478. 



Genus Percnon, Gistel. 



1835. Acanthopus (preoccupied), de Haan, Crust. Japon., decas 2, p. 29. 



1848. Percnon, Gistel, Naturg. Thierreichs, p. viii. 



1900. „ Rathbun, Pr. U.S. Mus., vol. xxii. p. 281. 



1910. „ Stebbing, Ann. S. Afr. Mus., vol. vi. pt. iv. p. 324. 



Percnon planissimus (Herbst). 



1804. Cancer planissimus, Herbst, Krabben u. Krebse, vol. iii. part iv. p. 3, pi. lix. fig. 3. 



1825. Plagusia clavirnana, Desmarest, Consid. gen. Crust., p. 127, pi. xiv. fig. 2. 



1838 (?) „ „ Milne-Edwards, Regne anim., "Undated Crust.," pi. xxiii. fig. 3. 



1900. Liolophus planissimus, Alcock, J. Asiat. Soc. Bengal, vol. lxix. p. 439 (copious synonymy). 



1902. ,, ,, de Man, Abhandl. Senckenberg. not. Gesellsch., vol. xxv. part iii. p. 543, 



pi. xx. fig. 12. 

 1900. Percnon planissimum, Rathbun, Pr. U.S. Mus., vol. xxii. p. 281. 



1908. ,, ,, Verrill, Tr. Connect. Ac. Sci., vol. xiii. p. 334, pi. x. fig. 3, pi. xii. fig. 4. 



1910. „ „ Stebbing, Ann. S. Afr. Mus., vol. vi. part iv. p. 324. 



This strikingly marked little species has an extensive distribution, being recorded 

 from the East Indies, Australia, New Zealand, the Cape of Good Hope, Chile, Japan, 

 and the Bermudas. According to Krauss the South African specimens have the 

 carapace dusky greenish brown, with a bright blue stripe down the middle, and the 

 feet striped (gebandert) with reddish brown and yellow. Alcock for the Indian 

 species says that " the colour in life is dark green, the nude streaks being bright 

 green." Herbst's figure shows the rostrum projecting strongly beyond the flanking 

 lobes, which in the Scotia specimen as in the figures by Desmarest, Milne-Edwards, 

 and Verrill nearly or quite equal the rostrum in length. Here also, as in Verrill's 

 figure, several of the legs are cross-banded instead of being longitudinally striped. 



Locality. — St Vincent, Porto Grande, shore ; December 1, 1902 ; Station 24. 



Family Gecarcinid^e. 



1837. " Gecarciniens," Milne-Edwards, Hist. Nat. Crust., vol. ii. p. 19 

 1852. Gecarcinidse, Dana, U.S. Erpl. Exp., vol. xiii. p. 374. 

 1894. ,, Ortmann, Zool. Jahrb., vol. vii. p. 732. 



