CARCINOLOGICAL STUDIES. 247 



they are a little erose , but not granulate or denticulate 

 at all. The postero-lateral margins are slightly con- 

 cave. The upper surface of the carapace is finely punc- 

 tulate, somewhat coarser on the front and on the cardiac 

 and intestinal regions. Near the postero-lateral margins 

 many oblique wrinkles are observed , as usually , that pass 

 forwards and downwards to the inflected portions of the 

 cephalothorax ; the latter are therefore covered with nu- 

 merous oblique wrinkles and the pterygostomian regions 

 are also a little rugose. The oblique wrinkles pass also in 

 this species from the postero- to the antero-lateral mar- 

 gins (fig. 3) and , becoming gradually smaller and shorter, 

 may be seen until near the external orbital angles ; small 

 punctulations are found in front of all these wrinkles , so 

 that the upper surface of the cephalothorax appears also 

 closer and more coarsely punctulate near the antero-lateral 

 margins than on the gastric region. 



The impressed line on the punctulate ischium-joint of the 

 outer foot-jaws (fig. 3^^) runs close to the internal margin 

 of the joint and not in the middle of it. 



The male abdomen (fig. 3") somewhat resembles that 

 of Geot. picta , but the penultimate joint is distinctly a 

 little longer than broad at its anterior or posterior 

 margin and it is somewhat constricted in the middle , 

 so that the lateral margins are concave ; the terminal joint 

 is a little longer than the penultimate, once and a half 

 as long as its posterior margin , the lateral margins are 

 slightly concave and the tip is rounded. Sternum and ab- 

 domen are rather coarsely punctate. 



The anterior legs of the male are unequal in form 

 and size , the larger being found on the right side. The 

 arms do not project as far beyond the lateral margins of 

 the cephalothorax as those of Geot. Goudoii. The upper 

 surface of the wrist, armed at its internal angle with a 

 short , though acute tooth , is slightly rugose and erose. 

 The larger hand (fig. 3^) is scarcely twice as long as high 

 and the fingers are but little longer than the palm; the 



Notes from the Leyden JVIuseuiii, "Vol. XIV. 



