as high, the latter with no transverse groove near the dactylus, 



fingers slightly longer than the palm savuensis de Man 



c $ Merus of 3 rd legs with a small acute tooth at distal extremity, the 

 merus 5-times as long as wide. Rostral carina not continued 

 backward beyond the base of the orbital hoods. Larger chela 

 of the male 2, 5-times. smaller chela 4,6-times as long as high; 

 the latter without transverse groove and with the fingers just as 



long as the palm Miersi Cout. 



« 2 Larger chela with no transverse groove near the base of the dactylus ; 

 dactylus of smaller chela of the male usually not "Balaeniceps"-shaped. 

 ó 1 Palm of smaller chela of the male not longer than high, without 

 transverse groove; fingers in adult specimens 2, 5-times, in younger 

 ones twice as long as the palm, gaping, excavate at the inner side, 

 dactylus 5-times as long as high, not "Balaeniceps"-shaped. Rostral 

 carina continued to the middle of the carapace. Merus of i st legs 



with a spine at the apex of the upper margin distingziendus de Man l ) 



(W. DE Haan, Fauna Japon. Crust. 1849, p. 177, PI. XLV, fig. 2 (A. rapax) and 

 J. G. de Man 1. c. 1909, p. 155, PI. VII, fig. 9 — 14). 



ö„ Palm of smaller chela of the male distinctly longer than high, about 



one and a half times. 



c x Rostrum small, extending back beyond the base of the eye-arch. 



Larger chela almost 4-times as long as high, with a very pro- 



nounced keel running down the centre of the back (outer face) 



of hand. Fingers of smaller chela of the male slightly longer 



than the palm, gaping Halesii Kirk 



(T. W. KlRK, in: Trans. New Zealand Institute, Vol. XIX, 1887, p. 194, PI. VID, 

 Fig. 1 and 2). 



c 2 Rostral carina continued almost to the middle of the carapace, 

 though it is already obtuse posterior to the orbital hoods. Larger 

 chela of the male almost 4-times as long as high, without ridges 

 on the outer surface. Smaller chela of the male with the fingers 

 twice as long as the palm, dactylus not "Balaeniceps"-shaped . rapacida de Man 



c z Rostrum continued in a narrow, sharp and prominent carina that 

 extends backward to behind the middle of the carapace. Chela 

 of the female 3-times as long as high. Second carpal article of 

 2 nd legs twice or a little more than twice as long as i st , 2 nd 

 article 10-times as long as thick (in A. rapacida 6-times). Merus 

 of 3 rd legs 6-times as long as wide (in A. rapacida 5-times) . Icpidus de Man 2 ) 



1) As a variety of this species ought perhaps to be regarded a female from the over near Pare-Pare, Celebes, desciïbed by 

 me in: Max Weber's Zoolog. Ergebn. II, 1892, p. 404 and in: Mém. Soc. Zool. France, 1909, p. 156. 



2) ./. lepidus is inserted at this place with some doubt, because the smaller chela is unknown. It may, however, be recognized 

 by the indicated characters. 



192 



