117 . . 



a little shorter than the rostrum, slightly divergiug outward, rarely 

 projecting straight foreward ; the three spines, not setose, are 

 distiuctly curved upward at their tips. Visible part of Ist an- 

 tenuular article twice or almost twice as long as the 2nd, when 

 measured on the upper side, 3rd a little shorter than 2üd ; stylocerite 

 just reaching beyond the Ist article. Spines on the basicerite as in 

 Syn. Gravieri, carpocerite a little longer than antennular peduncle, 

 scaphocerite as in Si/n. Gravieri, but the terminal spine extending, 

 beyond the antennular stalk, to or almost to the tip of carpocerite. 



Telson shorter than in Si/n. Gravieri, its length being 2,44 — 2,75 

 times the width of posterior margin, the latter as in Si/n. 

 Gravieri, but the outer augles acute; anterior pair of spiuules 

 inserted just in front of the middle, posterior pair one and a half, 

 sometimes even more than twice as far distant from the posterior 

 margin as from the anterior pair. 



ïhoracic legs nearly as in Syn. Gravieri, meropodites of 3rd 

 and 4th legs 4-times longer than wide, those of 3rd with four 

 or five small spinules along the middle, those of 4th legs with 

 two or three ; dactyli as in Syn. Gravieri, but the ventral hook that 

 is 3-times as long as the dorsal one and more than 3-times as 

 thick, perpendicular to the lower border, the dactyli closely re- 

 sembliug Fig. 3a, PI. LXX. of Coutière's paper on the Alpheidae 

 of the Mald. and Laccad. Archip. 1905. 



Eggs rather large, 0,75 ra.m. long. 



Length of male 12 m.m., of ova-bearing female 12,5 m.m. 



20. Synalpheus jedanensis, n. sp. 



Station 273. Anchorage off Pulu Jedan, East coast of Aru- 

 islands (Pearl-banks). Depth 13 M. 



A new species of the Neomeris group, related to Syn. Gravieri 

 Cout. and Syn. Iphinoë, n. sp., but differing by the stouter shape 

 of the small chela and of the following legs. 



Frontal spines and both peduncles with appendages as in Syn. 

 Gravieri (Coutière, Alpheidae Maldive & Laccad. Archip. 1905, 

 PI. LXX, Fig. 2), but the carpocerite shorter, hardly longer than 



