84 CARCTNOLOGFCAL STUDIES. 



The cephalothorax of the larger specimen has a length 

 of 25 ram., so that this individual may be considered to be 

 adult. The wrist of the anterior legs presents a longitudinal 

 groove on its upper surface, which is situated close to 

 the internal margin. The fingers are about twice as long 

 as the horizontal length of the palm , the dactylus is armed 

 with a triangular obtuse tooth near the articulation with 

 the palm , and the inner margin of the index is granular 

 along its proximal half. The upper and lower margins of 

 the hand are carinate and two other divergent crests, 

 prolonged to the tips of the fingers, are observed on the 

 outer surface of the palm. 



21. Leptograpsus An s o ni H. Milne Edw. 



Leplograpsus Ansoni, H. Milne Edwards, Annales Sciences Naturelles, 

 3e Série, T. XX, 1853, p. 172. 



Mr. Kingsley in his „Synopsis of the Grapsidae" (Proc. 

 Acad. Nat. Sciences of Philadelphia , 1880, p. 197) regards 

 this species as identical Avith the common indo-pacific 

 Leptogr. variegatus Fabr. The author considers moreover 

 Leptogr. planifrons Dana and even all the tridentate 

 Leptograpsi of Milne Edwards, as synonyms of the same 

 species. Now the Leyden Collection contains two specimens 

 (cTi 9) from Valparaiso , which difier from a typical male 

 specimen of Leptogr. variegatus M. Edw. , kindly sent to 

 me by Prof. Milne Edwards , and collected at the Marque- 

 sas, firstly by a slightly more quadrate carapace, 

 of which the external orbital angles are a 

 little more distant from one another in pro- 

 portion to the greatest width of the cephalo- 

 thorax, so that the latter appears a little broader 

 anteriorly with less arcuate lateral margins ; secondly b y t h e 

 somewhat more slender shape of the ambula- 

 tory legs, the joints of which are a little less 

 enlarged. I, for that reason, suppose our specimens to 



Notes from the Leyden IVIuseum, "Vol. XII. 



