i 9 4 



fc 2 Dactylus of third legs with the ventral hook obtuse. Merus 



at the utmost 3,1-times as long as wide. 



p x Ventral hook of the dactylus spoon-like excavate, 



anterior margin of the dactylus with a process 



with which the dorsal hook has coalesced. Frontal 



spines acute, rostrum with the margins straight 



and converging from the base to the tip . . . CJiaron (Heller) 



p„ Ventral hook of the dactylus probably not excavate, 



anterior margin of the dactylus probably without 



a process. Lateral margins of the rostrum at first 



parallel, further converging to the tip. Lateral 



teeth broader than those of Syn. CJiaron (Heller), 



not acuminate Helleri de Man 



(Syn.: A. charon J. G. de Man, in: Zool. Jahrb. Abth. f. Syst. IX, 1S97, P- 743» 

 Taf. 35, fig. 63). 



a 3 Dactylus of third legs triunguiculate. 



b x Merus of third legs with movable spinules on its posterior margin. 



e x Terminal spine of scaphocerite shorter than carpocerite. Lower 



spine of the basicerite about as long as basal antennular article. 



d x Dactylus of third legs stout, about 1,5-times as long as broad 



at its base, the principal hook perpendicular to the axis of 



the joint Nilandensis Cout. 



d 2 Dactylus of third legs 2,5-times as long as broad at its base, 

 the principal hook directed obliquely forward .... 



Nilandensis Cout. var. bandaensis de Man 

 c„ Terminal spine of scaphocerite longer than carpocerite. Lower 

 spine of the basicerite reaching to apex of median antennular 



article Nilandensis Cout. var. oxyceros Cout. 



b % Merus of third legs unarmed. 



e x Spinules of the upper surface of the telson quite distinct. Propodus 



of third legs spinulose along its posterior margin. 



d x Dactylus of third legs with the ventral hook measuring three- 



fourths the principal, being almost as long as it. 



e x Fingers of large chela of moderate length, their length in 



proportion to that of the chela as 1 : 3,5. Carpocerite 



4,3 — 4,5-times as long as wide triunguiculatus (Paulson) 



(Confer: G. Nobili, in: Buil. Scientif. France et Belgique, XL, 1906, p. 25). 



e„ Fingers of large chela extraordinarily short, their length in 



proportion to that of the chela as 1 : 5,33. Carpocerite 



5-times as long as wide physocheles Cout. 



(H. COUTIÈRE, in: Buil. Soc. Philom. Paris, 190S, p. 10). 



62 



