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e 1 Basiceritc strongly spinous above, lower spine of basicerite 



not shorter than stylocerite. 



J\ Merus of third legs 3,2-times as long as wide, lateral 



frontal teeth triangular, subacute, rostrum hardly longer 



but much narrower than the lateral teeth, posterior 



margin of telson prominent, semicircular, with the outer 



angles straight or obtuse biunguiculatus (Stimps.) Cout. 



(H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 873, PI. LXXI, fig 8). 

 /„ Merus of third legs 4,2-times as long as wide, notches 

 between the rostrum and the lateral teeth wider than 

 in ƒ,, the lateral teeth narrower; merus of third legs at 

 most 1,32-times longer than the propodus, in Syn. bian- 

 guiculatiis 1,4-times. Dactylus of a less stout form. 



biunguiculatus (Stimps.) Cout. var. exilipes Cout. 

 (H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 874, PI. LXXI, fig. 10). 



e s Basicerite unarmed or almost unarmed above, lower spine 



of basicerite shorter than the stylocerite. 



f x Third antennular article one-third longer than second. Upper 



spine of basicerite very reduced. Stylocerite reaching to 



the middle of median article. Palm of the large chela 



truncate. Merus of third legs 3-times as long as wide. brachyceros Nob. 



(G. NOBILI, Ricerche sui Crostacei della Polinesia, Torino, 1907, p. 354, Tav. I, fig. 8). 



f 2 Third antennular article shorter than second. Basicerite 



unarmed above. Stylocerite as long as basal article. 



Palm of the large chela with an acute, spiniform tooth 



at the anterior margin. Merus of third legs 4,8-times 



as long as wide amabilis de Man 



d„ Dactylus of small chela bearing a dorsal brush of hairs. Basi- 

 cerite unarmed above. Posterior angles of telson spinous. 



Merus of third legs 4,5-times as long as wide lophodactylus Cout. 



(H. COUTIÈRE, in: Buil. Soc. Philom. Paris, 1908, p. 7). 



c 2 Merus of third legs with some movable spinules on the posterior 



margin. Lower spine of basicerite longer than the stylocerite, 



upper spine well-developed. 



d x Palm of large chela ending anteriorly in one tubercle only, 



that is directed straight forward. Terminal spine of scapho- 



cerite shorter than the antennular peduncle. Propodus of 



third legs of a rather stout form pachymeris Cout. 



(H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 873, PI. LXXI, 

 fig. 9 (Syn. biunguiculatus (Stimps.) Cout. var. pachymeris Cout.)). 



d s Palm of large chela ending anteriorly in two conical tubercles 



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