STUDIES IN AUSTRALIAN CRUSTACEA. 



No. 3.* 



By Allan R. McCulloch, Zoologist, Australian Museum. 



(Plates x.-xi., and Figs. 42-53). 



Family OCYPODIDiE. 



Euplax tridkntata, A. Milne Edwards. 



G leistostoma tridentatum, A. Milne Edwards, Journ. Mus. Codeff., 

 i., iv., 1873, p. 82. 



Chcenostoma tridentatum, de Man, Jahrb. Hamburgischen Wiss. 

 Anstalten, xiii., 1896, pp. 93-95, pi. iii., fig. 5, 5a, 5b (not 

 fig. 4). 



Metaplax hirsutimana, Grant and McCulloch, Proc. Linn. Soc. 

 N. S. Wales, xxxi., 1906, p. 21, pi. i., fig. 3, 3a, 36. 



Miss M. J. Rathbun has kindly examined specimens of our 

 M. hirsutimana and writes as follows : — " It is quite a puzzling 

 case and belongs to the Family Ocypodidae, Subfamily Macroph- 

 bhalminse. 



"In 1873 A. Milne Edwards described C leistostoma triden- 

 tatum from Upolu and gave as its collection number 3666a. In 

 1896, de Man described and figured, as he supposed, the rem- 

 nants of the type specimen (g) of G. tridentatum, A. M. Edw. ; 

 he figured the front, maxillipeds and claw, and described the 

 abdomen also. He says that on the bottle there is a label No. 

 2429, Australia, and inside is the number 3666«, and therefore 

 it is doubtful whether it came from Australia or Upolu. The 

 specimen described and figured by de Man is, I think, the same 

 species as your hirsutimana, and probably came from Australia. 

 If de Man really handled the type specimen, then A. Milue 

 Edwards' description is quite inadequate. 



" De Man further says that the species manifestly does not 

 belong to the genus Cleistostoma, in which the maxillipeds fit 

 close together, but perhaps to the genus Chamostoma, Stimpson. 

 I agree with him that it is not a Gleistostoma, but would call it 



* For No. 2 see Vol. vii., p. 305. 

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