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Some species described by Milne-Edwards are very badly known ; such are : C. xvhiiei, 

 C. p-anulosus, C. reynaudi and C. eydouxi. Most lilcely they are synonymous to others. 

 Key to the Indo-Pacific species : 



1. Lateral margins of carapace convex 2 



Lateral margins of carapace straight, subparallel or even 



divergent backward 5 



2. Meropodites of walking legs very broad, foliaceous, wi- 



dening distally and sharply keeled C. lophopus Nobili ') 



Meropodites of walking legs slender, not foliaceous . . 3 

 Abdomen of cf very broad, with the lateral margins 



parallel, penultimate segment at base nearly three times 



as broad as terminal segment C cmereus Dana ") 



Abdomen of rf with the lateral margins convergent 



towards the terminal segment 4 



4. Inner surface of palm of chela with a longitudinal row 



of sharp granules; palm itself higher than long . . C. audouini H. Milne-Edwards^) 

 Inner surface of palm mostly smooth, but in large indi- 

 viduals with a longitudinal row of some low granules ; 

 palm itself longer than high C. punctatiis H. Milne-Edwards *) 



5. Anterior half of carapace rather strongly and closely 



punctate. Inner margins of fingers of chela not dentate C. gramilatus Dana "') 

 Carapace smooth or sparsely punctate 6 



6. Lateral margins of carapace divergent backward and with 



two obscure notches anteriorly. Regions tolerably distinct C. loiigipes Stimpson °) 



i) Bull. Mus. Paris, t. ii, 1905, p. 411; Ann. Sc. Nat. (9) t. 4, 1906, p. 321, pi. 11, f. 4. Hab. Red Sea. 



2) Proc. .\c. Nat. .Sc. Philadelphia, 1851, p. 251; L. S. Expl. Exp., Crust., 1852, p. 360, pi. 23. f. 3; Cvelograpsus eydouxi^ 

 H. Milne-Edwards, .\nn. Sc. Nat. (3) I. 20, 1853, p. 198; C. cinerais Rathbun, Bull. U.S. Fish. Comm. for 1903, v. 23, prt 3, 1906, 

 p. 840; Proc. f. S. Nat. Mus., v. 38, 1911, p. 590. Hab. west coast of America and Hawaiian Islands. 



3) Hist. nat. Crust., t. 2, 1S37, p. 78; .Ann. Sc. Nat. (3) t. 20. 1853, p. 197; Dana, U.S. Expl. Kxp., Crust., 1852, p. 359, 

 pi. 23, f. 2; C. lavatixi H. Milne-Edwards, Ann. Sc. Nat. (3) t. 20, 1853, p. 197; C. whitei^ H. Milne-Edwards, .Ann. Sc. Nat. (3) t. 20, 

 1853, p. 197; C. laevis Hess, Arch. Naturgesch., Jahrg. 31, i., 1865, p. 152: C. lavaicxi Miers, Cat. Crust. New Zealand, 1879, p. 41; 

 C. lavauxi Haswell, Cat. Austral. Crust., 1882, p. 103; Eil.HOL, Miss, ile Campbell, t. 3, prt 2, 1885, p. 390, pi. 41, f. 6; C. laevis 

 de Man, Zool. Jahrb., Syst., Bd 2, 1887, p. 700; C. punctatiis (part.) Ortmann, Zool. Jahrb., Syst, Bd 7, 1894, p. 729; C. anJouini 

 Stimpson, Smithson. Inst., Miscell. Coll., v. 49, 1907, p. 132. Hab. east coast of Australia, New Guinea and New Zealand. De M.\n stated 

 the .identity of C. laevis Hess with C. lavauxi H. Milne-Edwards and the latter has been usually considered synonymous with C. audouini 

 of the same author, though the original specimen of C. audouini came from New Guinea, and that of C. lavauxi from New Zealand. 

 De Man afterwards (Zool. Jahrb., Syst., Bd 9, 1896, p. 352) had the opportunity of examining original specimens both of C. audouini 

 and C. lavauxi^ but he does not expressly slate any difference between them. Some authors (Haswell) deny, that the C. audouini of Dana 

 should be identical with that of Milne-Euwards. 



4) Hist. nat. Crust., t. 2, 1837, p. 78; Gnathochasmiis barhatus Mc Leay, Smith's 111. Zool. S. .\frica, 1S38, p. 65, pi. 3; 

 Sesarma barbata} Krauss, Siidafr. Crust., 1843, p. 45, pi. 3, f. 3; Cyclograpsiis punctatiis and C. reynaudi H. Milne-Edwards, Ann. Sc. 

 Nat. (3) t. 20, 1853, p. 197, pi. 7, f. 9; Haswell, Cat. Austral. Crust., 1882, p. 104; Ortmann (part.), Zool. Jahrb., Syst., Bd 7, 1894, 

 p. 729; Stimpso.s, Smithson. Inst., Miscell. Coll., v. 49, 1907, p. 132; Stebbing, S. .\. Crust, prt 5, 1910, p. 318; Rathbun, Proc. U.S. 

 Nat. Mus., V. 38, 191 1, p. 590. Hab. Cape of Good Hope, but also Tasmania, Hongkong, Juan Fernandez and Chile. 



5) Proc. Ac. Nat. Sc. Philadelphia, 1851, p. 251; U.S. Expl. Exp., Crust., 1S52, p. 361, pi. 23, f. 4; R.viHiir.N. Bull. U.S. 

 Fish Comm. for 1903, v. 23, prt 3, 1906, p. 840. Hab. Hawaiian Islands. 



6) Proc. Ac. Nat. Sc. Philadelphia, 1S58, p. 105; DE Man, Zool. Jahrb., .Syst., Bd 9, 1896, p. 355, Bd 10, 1898, pi. 32, f 43; 

 Stimi-son, Smithson. Inst., Miscell. Coll., v. 49, 1907, p. 131; Rathbun, Mem. Mus. comp. Zool. Harvard Coll., v, 3^. n» 2, 1907, p. 36. 

 Hab. Bonin Islands, Atieh, Tahiti, Paumotus and Fiji Islands. 



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