ioó 



10. Anterior part of carapacc strongly granulate. front little 

 deflexed, anterior margin straight; postfrontal lobes 

 four. Meropodites of walking legs with subrectangular 

 prominence near distal end of anterior margin ; hind 



margin of propodites and dactyli subspinulose B. octodentatus- (H. Milne-Edw.) 'j 



Anterior part of carapace finely granulate; front strongly 

 deflexed, anterior margin nearly straight; postfrontal 

 lobes two. Meropodites of walking legs with acute 

 spine near distal end of anterior margin B. spinosus (H, Milne-Edwards) 2 ) 



Acmaeopleura Stimpson. 



1858. Acmaeopleura Stimpson. Proc. Ac. Nat. Sc. Philadelphia, 185S, p. 105. 



This genus is very little known; the carapace is subcircular, unarmed at the margins 

 and resembling that of Cyclograpstis, but the external maxillipeds are widely different, merus 

 and i s c h i u m b e i n g subequal in 1 e n g t h , and broader than long. Two very 

 minute species, the carapaces of which attain only a length of a few millimetres, belong to 

 this genus. 



Key to the species : 

 Carapace widest near the antero-lateral angles; suborbital crest 3- 



or 4-lobed. Chelipeds smooth externally, hands with some strong 



granules at the inner surface, and the gap between the fingers 



filled with hairs externally A. parvula Stimpson 8 ) 



Carapace widest at the middle. Chelipeds granulate A. rotunda Rathbun *) 



Eriocheir de Haan. 



1835. Eriocheir (part.) de Haan. Faun. Japon., Crust, p. 32. 



1853. Eriochirus H. Milne-Edwards. Ann. Sc. Nat. (3) t. 20, p. 176. 



This genus much resembles Brachynotus, but the breadth of the front is only one-third 

 of the maximum width of the carapace, there are usually three teeth behind the external orbital 

 angle, and the front is usually strongly 4-lobed. The genus only inhabits Japan and China. 



Key to the species : 

 1. Anterior margin of front 4-lobed; surface of carapace uneven. 



Chelae thickly clothed with hairs 2 



1) Cyclograpsus octodentatus H. Milne-Edwards, Hist. nat. Crust., t. 2, 1S37, p. So: Heterograpsns o. H. Milne-Edwards, Ann. 

 Sc. Nat., (3) t. 20, 1853, p. 194; Grafsus inornatus Hess, Arch. Naturgesch., Jahrg. 31, I, p. 14S, pi. 6, f. 11 (f. e>e Man', Zool. Jahrb., 

 Syst., Bd 2, 1887, p. 699); Heterograpsns o. Kingsley, Froc. Ac. Nat. Sc. Philadelphia, 1SS0, p. 209; Haswell, Cat. Austral. Crust., 

 1882, p. ioi; Grafsus inornatus Haswell, Ibid., p. 98. Hab. Tasmania, King Island, Sydney. 



2) Heterograpsns spinosus H. Milne-Edwards, Ann. Sc. Nat. (3) t. 20, 1853, p. 194: A. Milne-Edwards, Journ. Mus. Godeft'roy, 

 t. 3. 1S74, p. 82; Kingsley, Proc. Ac. Nat. Sc. Philadelphia, 1880, p. 210; de Man, Notes Leiden Mus., v. 13, 1891, p. 56, pi. 4. f. 15; 

 ORTMANN, Zool. Jahrb., Syst., Bd. 7, 1894, p. 715. Hab. Vanikoro Island, Upolu and East Australia. 



3) Proc. Ac. Nat. Sc. Philadelphia, 185S, p. 105; Smithson. Inst.. Miscell. Coll., v. 49, 1917, p. 130, pi. 11. f. 4. Hab. Ousima (Japan). 



4) Proc. Biol. Soc. Washington, v. 22, 1909, p. 109: K. Dansk. Vid. Selsk. Skr., 7. Raekke, Afd. 5, n n 4, 1910, p. 327, textt'. 10. 



"Ml. 



lOÓ 



