I. '08. 



128 



Leander serratus (p. 130). 



Eostrum trending definitely 

 upwards at apex, without 

 chromatophores . 



Rostrum armed dorsally 

 with six to eight teeth/ which 

 do not extend into the distal 

 third ; the posterior tooth 

 situated on the carapace well 

 behind the orbital notch, the 

 second either immediately 

 over the orbital notch or 

 slightly behind it. 



Rostrum armed ventrally 

 with five, less commonly 

 with four, teeth. 



Shorter ramus of the outer 

 antennule fused to the longer 

 for about one quarter its 

 length. Shorter ramus reach- 

 ing only about to the apex of 

 rostrum. 



Antennal scale widest bas- 

 ally, its outer margin prac- 

 tically straight. 



Mandibular palp three- 

 jointed. 



First pair of pereiopods 

 falling short of apex of anten- 

 nal scale. 



Second pair of pereiopods 

 reaching beyond apex of an- 

 tennal scale by about one- 

 third the length of the chela. 



Chelae of second pair longer 

 than carpus, with dactylus as 

 long as, or at least three-quar- 

 ters the length of , the palw ; 

 carpus considerahly shorter 

 than nierus. 



Leander adspersus (p. 131). 



Eostrum hardly trending 

 at all upwards at apex, the 

 lower half thickly sprinkled 

 with small dark chromato- 

 phores. 



Rostrum armed dorsally 

 with five to seven teeth^, 

 which extend well into the 

 distal third ; the posterior 

 tooth situated on the carapace 

 well behind the orbital notch, 

 the second slightly in front of 

 or immediately over the orbi- 

 tal notch. 



Rostrum armed ventrally 

 with three, rarely four, 

 teeth. 



Shorter ramus of the outer 

 antennule fused to the longer 

 for about one-third its 

 length. Shorter ramus reach- 

 ing beyond the apex of ros- 

 trum by more than three- 

 quarters of its free length. 



Antennal scale widest bas- 

 ally, its outer margin slightly 

 convex. 



Mandibular palp three- 

 jointed. 



First pair of pereiopods 

 reaching to, or extending a 

 little beyond, apex of anten- 

 nal scale. 



Second pair of pereiopods 

 reaching beyond apex> of an- 

 tennal scale by nearly the 

 whole length of the chela. 



Chelae of second pair 

 longer than carpus, with dac- 

 tylus more than three-quar- 

 ters the length of the palm; 

 carpus longer than merus. 



1 Not counting the small distal tooth which is usually present, and 

 which forms the upper portion of the bifid apex. 



