OCYPODE AFRICANA DE MAN. 155 



regions of the upper surface of the carapace are provided 

 with many oblique depressed lines. The convex pterygo- 

 stomian regions on the under surface are smooth in Geoth. 

 Dehaanii, but provided with many short oblique rugose 

 lines in the other. The outer surface of the external ma- 

 xillipedes is coarsely punctate; the longitudinal depressed 

 line, that occurs on the outer surface of the second joints, 

 on which importance as a specific character Mr. Hilgen- 

 dorf has directed the attention , in Geoth. Dehaanii runs 

 in the middle of these joints , but in Geoth. Kuhlii is much 

 more approximate to the internal margins ; finally the third 

 joints are more quadrangular in this new species , the 

 antero-external angle much less pulhng out. 



The male abdomen has quite a different shape in both 

 species ; in Geoth. Dehaanii the lateral margins are straight 

 or slightly convex , in the other form very concave on 

 the contrary, so that the male abdomen of the Japanese 

 form very much resembles that of Telphusa Pealiana Wood- 

 Mason , that of Geoth. Kuhlii somewhat resembling that 

 of Paratelphusa spinigera of the same author (Journal Asias. 

 Soc. of Bengal, Vol. XL, 1871 , PI. II , fig. 4 and PI. 

 XIV, fig. 11). 



As regards the anterior and ambulatory legs , they wholly 

 resemble one another in both species , the dactylopodites 

 also being wholly similar in these two forms , and there- 

 fore without any doubt different from those of Geoth. oh- 

 tusipes Stimpson. 



The greatest breadth of the carapace of a female indivi- 

 dual of Geoth. Kuhlii is 31 m.m. '). 



10. Ocypode africana de Man. 



Confer: de Man, in: Notes from the Leyden Museum, 

 Vol. Ill, pag. 253, (Octob. 1881), and Miers, on the 



1) The Museum has still (/iree other species of Gtothtilphusa , respectively 

 from Java , Borneo , and an unknown locality , but I cannot describe them as 

 new, the Geothelphusa picta v. Martens being too insufficiently known. 



Notes from tlie Leyden ÜVIuseum, Vol. V. 



