289 



margin unarmed at apex, iiifero-iuternal margin with 4, respecti- 

 vely 2 sraall, movable spinules aud a larger immovable spine 

 uear the apex. Large chela of the female as in the var. hengalensis^ 

 but 4 tiraes as long as high in the plane of the fingers; small 

 chela as in that variety, the palm unarmed. 



Relative dimensions of 3rd pair: Meropodite 1,8; carpus i, 

 propodite 1,44. Meropodite 8,5 times, propodite 12 times as long 

 as broad, the propodite with 4 or 5 spinules, dactylus slender, 

 8 times as long as thick at base, simple and measuring almost 

 ^/g of the propodite. Dactylus of 5th pair a little more than '/, 

 of the propodite. 



Leugth 13 mm. 



3. Alpheus dolichodactylus Ortm., var. leptopus n. 



Station 12. Lat. 7°15'S., long. 115° 15'. 6 E. Depth 289 M. 



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



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



Station 213. Saleyer-anchorage and Surroundings. Depth 



18—45 M. 



Station 311. Sapeh-bay, East coast of Sumbawa. Depth up to 



36 M. 



Rostrum acute, reaching to the middle or to the 2nd third of 

 visible part of Ist antennular article, orbital hoods as prominent 

 as in A. paralpheopsides Cout. Telson and antennal region as in 

 the typical species, but the 2nd antennular article hardly oue 

 and a half or even only one third longer than basal article, in 

 the typical species almost twice as long as the latter. Chelipedes 

 and three posterior legs more slender than in the typical species. 

 Proportion between length and height of larger chela in the male 3,2, 

 in the female 3, 6 ; in the male of the typical species 2,5, in the female 

 3. Proportion between length and width of meropodite of the small 

 chelipede in the female 6,2, in the female of the typical species 

 3,45 ; proportion between length and width of small chela in the 

 female of the variety 8, in that of the typical species 5,7. 



Relative dimensions of 3rd pair in the male; Meropodite 1,9 — 2, 



