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Challenger Anomura, 1888, p. 60 : Milne Edwards and Bouvier, Mem. Mus. Comp. Zool. 

 Harvard, XIV. 3, 1893. p. 156: Stebbing, Hist. Crust. 1893, p. 160; Ortmann in Bronn's 

 Thier Reich, Malacostraca, p. 1146: Thomson, Trans N. Z. Inst., (1898) 1899, p. 171 : Young, 

 Stalk-eyed Crust. West Indies, 1900, p. 363. 



Carapace elongate, broadened posteriorly, well calcified in front of the 

 cervical groove and in the neighbourhood of the cardiac region. Rostrum 

 distinct, but short. 



Abdomen well developed, soft, spirally coiled, with the terga widely 

 separated. 



Eyestalks long and slender : ophthalmic scales of good size, almost 

 always closely approximated. Antennal acicle usually short : antennal 

 flagellum long, non-setose. 



External maxillipeds approximated at base. The exopodites of all three 

 pairs of maxillipeds have a well-developed flagellum. The endopodite (palp) 

 of the first maxillae has a recurved flagellum. 



Chelipeds similar, equal or subequal, or one may be slightly larger than 

 the other: the fingers open and shut in a horizontal plane, their tips are 

 corneous and a good deal spooned. 



4th pair of legs subcheliform, the 5th pair cheliform : both have, on the 

 outer surface, near the tip, a patch of imbricating corneous granules. 



Except for the appendages which form the tail-fan, there are no paired 

 appendages in either sex. In both sexes, on the left side, an unequally- 

 biramous appendage is found on the and, 3rd, 4th, and 5th somites. The 

 tail-fan, in all its parts, is more developed on the left side than on the right. 

 A patch of imbricating corneous granules exists, as usual, on the dorsal 

 surface of both rami of the swimmerets. 



The gills are phyllobranchiae, and in number and disposition are as in 

 Paguropsis and Paguristes. 



Clibanarius differs from Paguristes in the following particulars : — the 

 rostrum is, usually, less prominent ; the ophthalmic scales are, usually, 

 almost in contact ; the 4th pair of legs are subcheliform ; there are no paired 

 appendages on the anterior abdominal segments in either sex ; and the rami 

 of the unpaired abdominal appendages are less unequal. 



The species of this large genus are found in tropical seas — ranging also 

 to a certain extent into temperate waters— all round the globe. 



About half the species known inhabit the Indo-Pacific, from the Red 

 Sea and E. coast of Africa to the Sandwich Is. Five species occur on the 

 Western Pacific coast, from Vancouver I. (about 50° N.) to Ecuador. 

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