104 



long as the palm. Second carpal segment 8-times, 3rd 4-times 

 as long as thick. 



Ischium-joint of 3rd and 4th legs with movable spine ; mero- 

 podite of these legs 5-times longer than wide, their posterior 

 margin with a small, acute tooth at distal extremity and armed 

 moreover with 4, respectively 3 small, movable spinules as in 

 A. Lanceloti] propodite of 3rd legs 6-times longer than wide, 

 1,25-times longer than the slender, unarmed carpus, which is 

 4-times as long as thick distally; propodite with 6 pairs of 

 spinules, dactylus two fifths of the propodite, half as long as 

 the carpus, simple. 



Length of single, probably young specimen, 14 m.m. 



6. Alpheus acutocarinatus, n. sp. 



Station 2. Lat. 7° 25' S., long. 113° 16' E. Madura-strait 



Depth 56 M. 



Station 19. Lat. 8° 44'. 5 S., long. 116° 2'. 5 E. Bay ofLabuan 



Tring, west coast of Lombok. Depth 18 — 27 M. 



Station 116. Lat. 0° 58'. 5 N., long. 122° 42'. 5 E. West of 



Kwandang-bay-entrance. Depth 72 M. 



Station 311. Sapeh-bay, East coast of Sumbawa. Depth upto 36 M. 



A new species of the group „brevirostris" , related to A. macrosceles 

 Alc. and Anders, and to A. Talismani Gout. Carapace half a long 

 as abdomen, integument smooth and polished. Rostrum acute, 

 narrow, reaching to the middle or to the distal third of the 

 visible part of Ist antennular article, continued in a prominent 

 and sharp carina, that extends almost to the posterior third of 

 the carapace and that is separated from the rounded, unarmed, 

 orbital hoods by narrow, deep grooves ; immediately behind the 

 orbital hoods the rostral carina bears a small, obtuse tubercle or 

 tooth. Interorbital part of rostral carina concave, concealed, in a 

 lateral view, by the orbital hoods. 



Telson half as long as carapace, twice as long as its greatest 

 width, taperiug rather strongly aud presenting therefore an 

 elongate shape, the posterior margin, that is very prominent and 



