igiq. 



S. Kemp : Notes on Crustacea Dccapoda. 



393 



Macrophthalmus teschi, sp. iiov. 

 (Plate xxiv, figs 8, 9.) 



1888. Maci'ophtlialm'js depressus, de Man, Joiivn Li)in. Soc. Zool., XXII. 

 p. 124 (? all). 

 '' 1895. Macrophflialmus depressus, de Man, Zoul. Jahrh. Syst , W\\\, p. 578 

 it)oo. MacrophtJialmus depressus, Alcock, Joiirn . Asiat. Soc. Bengal , I, XIX, 

 p. 380 (in part). 



This species is very closely allied to M . depressus ', males differ 

 only in the following particulars : — 



M. depressus, RuppL'il. 



Granulation of lateral parts of cara- 

 pace close, the interspaces between the 

 granules being little if at all greater 

 than the diameter of the granules. 



The transverse row of granules ex- 

 tending inwards from the posterior 

 antero-lateral tooth of the carapace is 

 inconspicuous, being lost in the close 

 granulation of the adjacent parts. 



Edges of rostrum not crenulate. 



Upper border of palm of cheliped 

 with a row of large granules ; lower 

 surface quite smooth i. 



Fixed finger of chela very slightly 

 deflexed with a low crest on its prehen- 

 sile edge reaching beyond the middle 

 of its length. 



Sternum finely granular throughout. 



Af. teschi, sp. nov. 



Granulation of lateral parts of cara- 

 pace sparse, the interspaces between 

 the granules being much greater than 

 the diameter of the granules. 



The transverse row of granules 

 extending inwards from the posterior 

 antero-lateral tooth of the carapace is 

 conspicuous. 



Lateral and frontal edges of rostrum 

 crenulate. 



Upper border of palm of cheliped 

 without large granules ; lower surface 

 conspicuously granular proximally. 



Fixed finger of chela strongly de- 

 flexed with a very large tooth on its 

 prehensile edge not reaching beyond 

 the middle of its length (fig. 8). 



Sternum granular only near abdo- 

 men, quite smooth externally. 



From M. japonicus, de Haan, with which I have also compared 

 it, M. teschi may be distinguished by the following characters, — 

 (i) the orbital borders are less oblique, (ii) the upper orbital border 

 is finely crenulate and the lower serrate (in M. japonicus both are 

 finely serrate), (iii) the antero-lateral margins are finely crenulate 

 (rather coarsely tuberculate in M. japonicus) , (iv) the palm is 

 smooth dorsally and does not possess the row of granules found in 

 M. japonicus on the upper part of the inner surface, (v) the whole 

 inner surface of the chela, including the fingers, is densely clothed 

 with hair, (vi) there are no spinules on the upper border of the 

 dactylus of the chela, (vii) the posterior borders of the meropodites 

 of the walking legs are finely crenulate, without the blunt spinules 

 seen in M .japonicus. 



In M. definitus, Adams and White, which I have not seen, 

 the carapace is proportionately broader, the length being' three 

 quarters the greatest breadth ; the central portions of the carapace 

 are smoother and there is a granular line, anteriorly convex, on 

 each epigastric lobe. Moreover, the upper border of the palm is 

 coarsely granulate in this species and there is a transverse ridge on 

 the third abdominal segment. 



' Except for an exceedingly fine frosting only visible with a powerful lens' 

 the surface is quite smooth to the touch. 



