J J 



o 



/^ Fingers of the small chela as long as or somewhat longer 

 than the palm. Dactylus of the large chela half as long 

 as the palm Haafiii Ortm. ^) 



(W. DE Haan, Fauna Jap. Crust. 1849, p. 180, PI. XLV, fig. 5 (A. minor); 

 A. Ortmann, in: Zoolog. Jahrb. V, Syst. 1890, p. 472; J. G. DE Man, ibidem, 

 IX, Syst. 1897, p. 751). 



/„ Fingers of the small chela of the male almost twice as long 

 as the palm. Dactylus of larger chela not shorter than 

 the palm. Carpocerite as long as antennular peduncle. 

 Terminal spine of scaphocerite not reaching beyond the 

 tip of the rather broad scale inacrodactylus Ortm. 



(A. Ortmann, in: Zool. Jalirb. V, Syst. 1890, p. 473, Pi. XXXVI, fig. 10, 10/; 

 J. G. DE Man, in: Mem. Soc. Zool. France, 1898, p. 321, PI. IV, fig. 4). 



/"g Fingers of the small chela at least 3-times as long as the palm. 

 Carpocerite slightly longer than the antennular peduncle. 

 g^ Fingers of smaller chela parallel, not gaping .... malabaricits Fabr. 

 (Vide: J. R. Henderson, in: Trans. Linn. Soc. London. Ser. 2, Vol. V, 1893, PL XL, 

 fig- 1—3)- 



^3 Fingers of smaller chela gaping. 



Ii^ Merus and propodus of 3'^'^ legs 6- resp. 7-times as 

 long as wide. Terminal spine of scaphocerite distinctly 



reaching beyond the tip of the scale 



malabaricus Fabr. var. dolichodactyhis Ortm. 

 (A. Ortmann, in: Zool. Jahrb. V, Syst. 1890, p. 473, PI. XXXVI, fig. 11). 



h^ Merus and propodus of 3''<^ legs 7 — 8- resp. 10- 11 -times 

 as long as wide. Terminal spine of scaphocerite not or 

 hardly extending beyond the rounded tip of the rather 



broad scale ])ialabariciis Fabr. var. leptopns de Man 



(7„ Merus of 3''! legs with an acute tooth at the ape.x of posterior margin. 



(5j Inferior spine of basicerite reaching about to the middle of 2^^ joint 



of antennular peduncle. First carpal article of 2'"^ legs almost twice 



as long as 2"'' parvi-ros^ris D3.n3.~) 



b^ Inferior spine of basicerite rudimentary or wanting. 

 c-^ Dactyli of three posterior legs biunguiculate. 



First carpal article of 2^"^ legs equal to 2"*^. Merus of 3'''^ legs less 



than 3-times as long as wide Jioplites Nob. 



(G. NOBILI, Ricerche sui Crostacei della Polinesia, 1907, p. 357, Tav. I, fig. 7). 



i) A. Haanii is included in the section ^3 on the authority of Dr. Ortmann, who did not observe the "Balaeniceps"-form of 

 the dactylus of the smaller chela in the six specimens at his disposal. De Haan's original description of A. minor has perhaps been 

 made after a single female. 



2) It is to A, parvi-rostris that most closely approaches the egg-bearing female from Station 33, but it differs by the merus of 

 3''' legs being unarmed. It is not included in the key, because the larger cheliped and the 2"'' legs are wanting. 



19S 



