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3. Protogastric and mesogastric region inflated, with a large, 



cup-shaped ridge (the ridge being broad and longitudinal 

 on the mesogastric region and anteriorly bifurcating into 

 two narrower, somewhat wavy ridges, directed towards 

 the orbits) ; across the cardiac and the branchial regions 

 there runs a thick, prominent, transverse ridge. Chelipeds 

 (of cf) much hairy; outer surface of palm with a thick 

 tuft of hairs, and without a longitudinal ridge near under 



border of palm U. nausithoe de Man 



Carapace without prominent ridges. Cheliped of cf with a 

 longitudinal ridge near under border of palm .... 4 



4. Angles of front rounded. Meropodites of walking legs (2 d 



and 3 d pair) about 3 times as long as broad .... U. glaöra A. Milne-Edwards r ) 

 Angles of front acute. Meropodites of walking legs (2 d and 



3 d pair) about 5 times as long as broad U. gracilipes White 3 ). 



1. Utica nausithoe de Man. 



1895. Utica nausithoe de Man. Zool. Jahrb., Syst, Bd 9, p. 113, Bd 10, 1S98, pi. 28, f. 24. 

 Stat. 131. Karakelang, Talaut Islands. 1 cf, 1 9- 



The cf is quite perfect and entirely agrees with de Man's diagnosis; the Q is un- 

 fortunately much damaged, like de Man's, as nearly all the limbs are wanting. There remains 

 only the left cheliped, which is very small and weak, without a longitudinal ridge on the palm, 

 and entirely covered by a short pubescence ; the fingers are as long as the upper border of 

 the palm and finely toothed at the cutting margins. The velvety pubescence on the prominent 

 ridges of the carapace, which renders them so conspicuous in the case of the cf, is entirely 

 wanting in the Q, though here the ridges themselves are quite as strongly developed. 



Both specimens attain about the size of the cf measured by de Man. The original specimens 

 came from Atjeh. Most likely the species is fluviatile, like the majority of its congeners. 



that his species might be identical with U. barbimana or U. selosipes Haswell, but the descriptions of both A. Milne-Edwards and 

 Hasweix (Cat. Austral. Cvust., 1882, p. ior, pi. 2, f. 2) are too fragmentary and insufficiënt. In comparing the figures of Haswell and 

 of DE Max it may be observed that the dactyli in the last pair of legs are as long as the propodites in the case of U. selosipes, but very 

 much shoitcr in U. borneensis. Besides, V. setosipts is a marine species, found at the sea-shore of Port Denison (Queensland); U. bor- 

 necnsis most likely lives in freshwater. Of U. barbimana only the cf, of both other species here named only the 9 i s known, so that the 

 chelipeds, that are widely different in the two sexes, do not offer us distinctive characters. 



1) Nouv. Arcli. Mus. Paris, t. 9, 1873, p. 296, pi. 14, f. 3. Hab. New Caledonia. 



2) Proc. Zool. Soc. London, 1847, p. 86; Adams and White, Voy. "Samarang", Crust., 1850, p. 53, pi. 13, f. 6; H. Milne- 

 EDWARDS, Ann. Sc. Nat. (3) t. 20, 1853, p. 177, pi. 7, f. 4 — \a. Hab. Philippines. 



There remains one species, U. crassimana Haswell (Cat. Austral. Crust., 1882, p. 102, pi. 2, f. 3) which I am unable of including 

 in this key. Epigastric ridges are not mentioned, and carapace and chelipeds are smooth, but there is a tuft of hair filling 11 p the gap 

 of the fingers and a longitudinal ridge on the fixed finger, not continued on the palm. The hairiness of the palm excludes the identity 

 of this species with U. glabra (of both species <ƒ are known); besides, U. crassimana is a marine species, like C setosipes, and found 

 at the same locality in Queensland; neither is Haswell's species identical with U. gracilipes, 011 account of the much shorter legs. 

 II VELT. Iitroself compares his species with U. barbimana, but the carapace of the Australian species is much broader (the width distinctly 

 excecding the length), the chelae are larger and the fingers more curved than in l'. barbimana. 



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