1922] 



S. Kemp: Notes en Crustacea Decapoda. 



169 



H. Second leg with carpus slightly 

 longer than chela, fingers unarmed 

 or with one minute tooth and much 

 longer than palm ; R. 8-9 : 2 



//'. Second leg with carpus shorter 

 than chela, ringers shorter than palm 

 with large teeth; R. 8-9 : 4-5 

 G'. Carpus of second leg equal to or 



shorter than palm ; dactylus of last 



three legs less than one third length of 



propodus. 



H. A small papilla on eye.stalk ; car- 

 pus and chela of first leg subequal ; 

 second leg with carpus as long as 

 palm and palm about as long as 

 fingers ; R. 7-9 : 2-5 ... 



H '. No papilla on eyestalk ; carpus of 

 first leg longer than chela ; second 

 leg with carpus shorter than palm 

 and palm fully twice as long as fin- 

 gers ; R. 7-9 : 2-3 



F'. Distal spine of antenna! scale not nearly 

 reaching end of lamella. 

 G. Rostrum very shallow, downcurved, 

 with 3 posterior dorsal teeth placed on 

 carapace ; last three legs extending far 

 beyond scale; R. 9 : 3 

 G'. Rostrum deep or moderately deep, 

 straight, with at most 1 posterior dor- 

 sal tooth placed on carapace ; last three 

 legs not extending beyond scale. 

 H. Upper border of rostrum very 

 strongly convex, ventral tooth placed 

 behind foremost dorsal tooth ; R. 

 5-7:0-2 ... ... ... 



H' . Upper border of rostrum straight, 

 ventral tooth in advance of foremost 

 dorsal tooth ; R. 5 : I ... 

 E'. Carpus of second leg less than half as 

 long as palm [distal spine of antennal 

 scale not nearly reaching end of lamella). 

 F. No conspicuous l comb of spines on 

 fingers of first leg. 



G. Rostrum with at least ten dorsal 

 teeth ; sixth abdominal somite more than 

 twice length of fifth ; R. 10-13 : 3 

 G'. Rostrum with at most eight dorsal 

 teeth ; sixth abdominal somite less 

 than twice as long as fifth. 

 H. Carpus of first leg longer than 

 chela. 



J. Rostrum deep in lateral view ; 



a single spine at distal end of basal 



antennular segment. 



K. Carapace of female greatly 



swollen dorsally ; telson with 



dorsal spines very small, both 



pairs situated in distal half of 



its length ; R. 5-7 : 0-2 



leptopus, sp. nov. 

 calmani Tattersall. 



seycliellensis Borr. 



americanus (Kings- 

 ley). 



tenelhis (Smith). 



diversifies, sp. nov. 

 potina Nobili. 



korni (I.o Bianco). 



brevicarpalis Schenk. 



' Under the microscope fine incisions may sometimes be detected in the cut- 

 ting edges of the fingers of the first leg in P. diversifies (text-fig. 396, p. 182). 



