CARCINOLOGICAL STUDIES. 25 



species by a minutely granulated , little prominent line. 

 In both species also the cephalothorax appears 

 little narrowed backwards and they may be dis- 

 tinguished already by this character alone, at first sight, 

 from many others, as e. g. from Gelas. Dussumieri, arcua- 

 tus , coarctatus , acutus , Urvillei etc. The inferior orbital 

 margin does not present even a trace of an accessory row 

 of granules , which occurs in other species , as e. g. Gelas. 

 signatus Hess, neither in the male nor in the female. 



In both species the anterior margin of the arm of the 

 larger chelipede of the male is armed with an acute 

 prominent tooth near the distal end. The carpopodite 

 is perfectly smooth on its rounded external surface, and 

 presents only a few minute granules on the upper surface 

 towards the inner margin. The larger hand shows some 

 resemblance , as to its general form , to that of Gelas. 

 acutus Stiraps. (vide de Man , in : Journal Linnean Soc. of 

 London, Vol. XXII, PI. VIII), but the inner surface of 

 the palm , though being somewhat granulated , does not 

 bear the granulated ridges which exist in that species and 

 which are so strongly developed in Gelas. vocans. The outer 

 surface of the palm is rather finely granulated , the 

 fingers are only a little longer than the palm. The immo- 

 bile finger , which is slightly curved upward , presents , 

 about as in Gelas. vocans, a shallow pit at its base and 

 is here a little more coarsely granulated; it is marked on 

 this place with a large red patch , which , according to 

 Miers , extends sometimes over the whole outer surface of 

 the palm. Both fingers are regularly tapering. The lower 

 finger bears two little prominent teeth or prominences on 

 the distal half of the inner margin; on the dactylus 

 only six or seven somewhat larger and several smaller 

 granules occur. 



The fingers of the smaller hand of the male are a little 

 shorter in proportion to the length of the palm than in 

 Gelas. vocans. 

 The ambulatory legs fully resemble those of the latter species. 



Notes from the Leyden Miuseum , Vol. XIH. 



