CARCINOLOGICAL STUDIES. 255 



though unarmed inner angle. The fingers are distinctly 

 longer than the palm. Both fingers and the palm are 

 smooth externally, but the palm is somewhat granulate on 

 the upper border and the mobile finger likewise at the base. 



The ambulatory legs are long and slender , so that e. g. 

 those of the penultimate pair are twice as long as the 

 cephalothorax is broad. The meropodites, armed with an 

 acute tooth at the distal end of their upper border , are 

 tliree times as long as broad and somewhat transversely 

 rugose on their outer surface. The slender propodites are 

 still a little longer than the dactylopodites , that are also 

 slender , slightly longitudinally sulcate , provided with 

 some small tufts of hair and slightly curved towards the 

 acute points. The propodites present also some small tufts 

 of hair, but for the rest the ambulatory legs are nearly 

 glabrous. 



The measurements of these two specimens and of the 

 male type-specimen of Ses. Ricordi in the Paris Museum 

 are the following: millimetres. 



1 2 3 



9 9 cf 



Distance between the external orb. angles I6V4 IIV4 14V3 

 Greatest width of the cephalothorax. . IVVs 

 Length of the cephalothorax .... I6V4 

 Breadth of the superior border of the front 9 

 Breadth of the inferior margin of the front 97-2 

 Length of the penultimate pair of legs 34 

 Length of the meropodites of the penul- 

 timate pair of legs 12 9V2 IOV2 



Breadth of the meropodites of the pen- 

 ultimate pair of legs 3V4 S'A 8V5 



N". 3 is the male type-specimen of Ses. Ricordi M. E. 

 in the Paris Museum. 



I moreover examined in Paris the single type-specimen 

 of Ses. Guerini M. E. , a female of which the locality is 

 unknown and it appears to me highly probable that this 

 species is identical with «Ses. Ricordi rr angustipes Dana. 



Notes from the Leyden Museum , Vol. XIV. 



