South African Crustacea. 11 



45 mm. long by 63 mm. broad. In the female the carapace is 



40 mm. long by 55 mm. broad. Another female, with carapace 



41 mm. by 48 mm., has the two middle frontal teeth blunt, more 

 advanced than their neighbours. Herbst's Cancer fasciatus, on his 

 pi. 49, fig. 5, might well have been drawn from such a specimen 

 as this. 



Alcock ends his account of the species by saying: "But for high 

 contrary authority, I should consider this species to be identical with 

 the Cancer sexdentatus of Herbst's pi. 7, fig. 52." He gives Cancer 

 fasciatus, Herbst, vol. iii., pt. 1, p. 62, pi. 49, fig. 5 (1799) as a very 

 doubtful synonym, subsequently referring it by preference to Charybdis 

 (Goniosoma) mergitiensis, de Man. Those who wish further to under- 

 stand the difficulties of identification should study Dr. de Man's 

 chapter on " Goniosoma merguiense, n. sp.," in the J. Linn. Soc. 

 London, Zool., vol. xxii., p. 82, 1888. 



Since the above account was written, Stimpson's report on North 

 Pacific Crustacea has appeared. At p. 81 it records from Hong 

 Kong Charybdis sexdentata (Herbst) de Haan, with references to the 

 sexdentatus or sexdentata of Herbst, Eiippell, and de Haan. Miss 

 M. J. Eathbun, the editor, gives in a footnote as the correct name 

 of the species Charybdis japonica (A. Milne-Edwards), without 

 further explanation. In part 2, p. 10, of the present series I have 

 already explained that Henri Milne-Edwards, in his Hist. Nat. 

 Crust., vol. i., p. 463, 1834, under his Thalamita annulata (Fabricius), 

 has erroneously quoted Cancer sexdentatus, Forsk. , as a synonym of 

 Portunus anmdatus, Fabricius, although Forskal did not name any 

 Cancer sexdentatus, Herbst's species of that name being the true 

 predecessor of Charybdis annulata (Fabricius). 



GEN. LUPA, Leach. 



1813. Lupa, Leach, Edinb. Encycl., vol. vii., p. 390. 

 1897. Portunus, M. J. Rathbun, Proc. Biol. Soc. Washington, vol. xi., 



pp. 155, 160. 



1902. Lupa, Stebbing, S.A. Crust., pt. 2, p. 11. 

 1907. Portunus, M. J. Bathbun, notes to Stimpson's North Pacific 



Crust., Smithsonian Misc. Coll., vol. xlix., p. 76. 



I feel bound to reiterate my protest against my friend's use of the 

 name Portunus, based on Latreille's supposed restriction of that 

 genus in 1810, when he mentioned P. pelagicus as a typical species 

 of it. Lamarck in 1801, Syst. Anim. sans Vert., p. 151, mentions 

 by name only P. depurator, Fab., which, on Miss Rathbun's principle, 

 may therefore claim to be the typical species, although no doubt 



