CARUINOLOGICAL STUDIES. 



99 



Fingers externaly 

 glabrous. 



Upper surface of the 

 hands of the male 

 with two longer and 

 seven or eight shorter 

 pectinated ridges . 



Ander soni de Man. 



30. Sesarma quadrat a Fabr. 



Sesarma quadrata , Fabricius , Supplem. Entomol. System, p. 341. 

 Sesarma quadrata, de Man, in: Zoolog. Jahrb. herausgegeben von 

 J. W. Spengel, Bd. II, 1887, p. 655. 



The Leyden Collection contains the following specimens : 

 one male from Padang , another male from Macassar, a 

 young male collected at Bezoeki , three male specimens from 

 the Indo-pacific Seas , of which the exact locality is un- 

 known, and finally the male type specimen of Sesarma 

 ajjinis de Haan from Japan. 



These specimens present the following dimensions: 



Macassar. 



cT 



lum. 

 Distance between the external 



orbital angles 30 



Length of the cephalothorax . 16^ 

 Breadth of the front . . .Hi 



Padang. 



mm. 



21 



16-1 



124 



The male specimen from Macassar, on account of the 

 proportion of the distance between the external orbital 

 angles and the length of the cephalothorax , must be re- 

 ferred to the variety aspera Heller, this specimen being 

 a little longer than the original specimen of Fabricius. 

 The upper margin of tbe mobile finger, however, presents 

 only twelve oval , transverse tubercles as in the type 

 specimen , so that this crab makes a transition to the type. 

 The inner surface of the palm is provided with a rather 

 prominent, transverse, granulated crest , composed of twelve 

 granules. 



Notes from thie Leyden IMuseum, "Vol. X!II. 



