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the (ïngers; the latter are compressed, especially in the d\ somewhat spooned at the tip, and 

 armed with obtuse, conical teeth at the inner margins, these teeth being equal at the movable 

 (ïnger, but very unequal in size at the opposite side. As is usual in the genus, the 

 and the 9 present a longitudinal ridge on the outer surface of the chela, running from the carpal 

 joint to the tip of the fixed iïnger, but this ridge nearly entirely disappears in the adult d 1 . 



The species has been first collected in Celebes and afterwards at Flores and Halmaheira, 

 but, as far as could be made out, only in freshwater; at Halmaheira it was met with even at 

 a height of 2500 feet. The specimens of the "Siboga" apparently lived on the reef and are 

 consequently marine. 



Among the dried Crustacea of the Leiden Museum I found 5 adult 9 of this species, 

 collected by v. Siebold in Japan, but not mentioned by de Haan in his Fauna Japonica; they 

 were labelled Heterograpsus sp. I am not aware, that this species has ever been recorded from 

 this locality so distant from the Moluccas. 



2. Pscudograpsus albus Stimpson. 



1858. Pscudograpsus albus Stimpson. Proc. Ac. Nat. Sc. Philadelphia, 1858, p. 104. 



1873. Pscudograpsus albus A. Milne-Edwards. Nouv. Arch. Mus. Paris, t. 9, p. 314, pi. 18, f. 2. 



1880. Pachvstomum philippinense Nauck. Zeitschr. wiss. Zool., Bd 34, p. 67 (f. DE Man, Zool. 



jahrb. Syst., Bd 2, 1887, p. 719). 

 1886. Pscudograpsus albus Miers. Rep. "Challenger", Brachyura, p. 262. 



1888. Pscudograpsus albus de Man. Arch. Naturgesch., Jahrg. 53, 1., p. 3S2. 



1889. Pscudograpsus albus de Man. Zool. Jahrb., Syst., Bd 4, p. 440. 

 1895. Pscudograpsus albus de Man. Zool. Jahrb., Syst., Bd 9, p. 111. 



1907. Pscudograpsus albus Stimpson. Smithson. Inst., Miscell. Coll., v. 49, p. 127. 



1907. Pscudograpsus albus Rathbun. Mem. Mus. comp. Zool. Harvard Coll., v. 35, n" 2, p. 32. 



Stat. 64. Tanah Djampeah, Flores Sea. 1 Q. 

 Stat. 172. Gisser Island, south-east of Ceram. 1 cf 1 . 



As de Man observed (1889, under the head of Ptychognathus pnisillus) the 9 of this 

 species may be easily confused with the same sex of Heller's species, but the carapace is 

 proportionally broader, the antero-lateral teeth are more pronounced and the maxillipeds are 

 rather widely different in Ptychognathus pusillus. 



Pseudograpsus albus ranges from Japan through the East-Indian Archipelago to New 

 Caledonia and Fiji. It seems to be entirely a marine species. 



3. Pseudograpsus laniger n. sp. PI. 5, Fig. 1. 



Stat. 64. Tanah Djampeah, Flores Sea. 1 rf. 

 Stat. 127. Taruna Bay, Great Sangir Island. 1 Q. 



This new species much resembles Ps. erythraeus Kossmann, but the antero-lateral teeth 

 of the carapace are scarcely indicated and the front is laminar, prominent. 



The length of the carapace is about exactly equal to the width between the anterior 

 epibranchial teeth. The surface is evenly and regularly vaulted in both directions, but the 

 postero-lateral regions of the carapace are somewhat more sloping near the margin. The 



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