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Thirdly the cutting margin of the immobile finger may be devoid of larger teeth, but 

 only finely serrated and elegantly curved; the convex portion represents the proximal larger 

 tooth. This is the typical marionis of Desmarest j ) and the chela has been figured again in 

 the papers of H. Milne-Edwards (1. c, pi. 3, f. 5) and Kingsley (1. c, pi. 9, f. 8). 



All these forms grade into one another, so that a sharp demarcation is impossible, the 

 less so because the shape of the carapace and of the walking legs in the different subspecies 

 is the same (de Max, 1. c, 1902, p. 489). 



The species has often been designated under the name of " Geta slums" vocans Linné, but, 

 as Kingsley (1. c. p. 141) explains, it is impossible to identify Lixxé's species 3 ). We should, 

 then, prefer the earlier name marionis to culirlmawx. 



The forms excisa, cultrlmana and marionis all occur in the "Siboga"-material. 



2. Uca tetragonon (Herbst). 



Synonymy and description: DE Man, Notes Leyden Mus., v. 13, 1891, p. 24, pi. 2, f. 6, and 

 Alcock, 1. c. p. 357. 



Stat. 47. Bay of Bima, Sumbawa. 1 rf. 



Stat. 131. Karakelang, Talaut Islands. 4 cT, 4 £• 



Stat. 250. Kur Island, west of Kei Islands. 3 <ƒ, 



All specimens, save one, have a reddish-brown carapace, marbled with light green, as 

 shown in the figure of de Max. 



3. Uca dussumieri H. Milne-Edwards. 



Synonymy and description: DE Man, Journ. Linn. Soc. London, v. 22, 1888, p. 10S, pi. 7, 

 f. 2 — 7, and Alcock, 1. c. p. 361. 



Stat. 19. Labuan Tring, west coast of Lombok, 1 rf. 

 Stat. 50. Labuan Badjo, west coast of Flores. 3 rf . 



The colour pattern of the carapace sometimes resembles that of the preceding species. 



4. Uca lactea (de Haan). 



Synonymy and description: Alcock, 1. c. p. 355. 



Stat. 19. Labuan Tring, west coast of Lombok. 1 rf . 

 Stat. 47. Bay of Bima, Sumbawa. 2 rf , 1 Q. 

 Stat. 50. Labuan Badjo, west coast of Flores. 1 rf . 

 Stat. 86. Dongala, west coast of Celebes. 8 <ƒ, 3 §. 



5. Uca gaimardi (H. Milne-Edwards). 



1852. Gelasimus gaimardi H. Milne-Edwards. Ann. Sc. Nat. (3) t. 18, pi. 4, f. 17. 



1891. Gelasimus gaimardi de Man. Notes Leyden Mus., v. 13, p. 39. 



191 3. Uca gaimardi Pesta. Denkschr. Ak. Wiss. Wien, Bd 88, p. 55, pi. 3, f. 3 and textfig. 2. 



1) Cons. s. 1. Crust., 1825. p. 124, pi. 13, f. I. 



2) H. Milne-Edwards in 1837 (Hist. nat. Crust., t. 2, p. 54) described under vocans an American species, and aftervards (Ann. 

 Sc. Nat. (3) t. iS, 1852, p. 145, pi. 3, f. 4) under the same name the true cultrimana. 



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