﻿106 



ALPHEUS RAPACIDA. 



Larger chela of the male finely granular both on the 

 outer and inner side, slender, almost 4-times as long as 

 high, without ridges on the outer surface ; upper border of 

 the palm without a transverse groove near the dactylus. 

 Chela compressed, half as thick as high, fingers little more 

 than half as long as the palm. Smaller chela of the male 

 resembling that of A. rapax de Haan (vide de Man, in: 

 Trans. Linn. Soc. 2nd Ser. Vol. IX, Part 11, 1907, PI. 

 XXXIII, Fig. 52), not Balaeniceps-shaiped; fingers twice 

 as long as the palm, gaping ; that of the female difi'ers by 

 the palm being slightly longer in proportion to the fingers. 



Second joint of carpus of 2nd legs little (i—^) longer 

 than 1st, chela just as long as l^t joint. Meropodite of 

 3rd legs unarmed, 5-times as long as broad ; propodite one 

 and a half as long as the unarmed carpus, slightly curved, 

 slender, narrowing towards distal extremity, with only 3 

 or 4 small spinules on its proximal half, both margins 

 beset with long setae ; dactylus two thirds of the propodite, 

 slightly arcuate, lanceolate, in the middle much broader 

 than high. 



9. Alpheus lepidus, n. sp. 



Station 51. Madura-bay and other localities in the 



southern part of Molo-strait. Depth 54 — 90 M. 

 Station 114. Lat. 0° 58'. 5 N., long. 122° 55' E. 



Kwandang-bay-entrance. Depth 75 M. 



A new species of small size of the group „orevirostris'^ 

 de M., closely related to A. rapacida, n. sp. 



Eostrum acute, reaching a little beyond the middle of 

 the visible part of 1st joint of antennular peduncle, as 

 broad at its base as it is long, continued in a narrow, 

 sharp and prominent carina that extends back- 

 ward to behind 'the middle of carapace. Telson 

 narrow, twice as long as broad anteriorly. 



Second joint of antennular peduncle one third longer 

 than the visible part of the 1st, twice as long as thick; 



Notes from the Leyden IMuseum, Vol. XXX. 



