ALPHEUS LEPIDUS. 



107 



carpocerite little longer than antennular peduncle, spine 

 on the basicerite small, shorter than rostrum ; scaphocerite 

 3-times as long as broad, just reaching beyond the carpo- 

 cerite, terminal spine extending with one third of its length 

 beyond the tip of the blade. Terminal joint of external 

 maxillipedes 4 1 / 2 -times as long as broad. 



Meropodite of larger chelipede of female 3-times as long 

 as broad, upper margin unarmed, infero-external margin 

 finely serrulate, infero-internal with 4 movable spinules 

 and, at the extremity, with a small acute tooth. Chela of 

 female 3-times as long as high, half as thick as high ; 

 palm without a transverse groove on the upper border, 

 twice as long as the fingers and appearing finely granular 

 under a lens, the granules acute. 



Second joint of carpus of 2 nd legs twice or a little more 

 than twice as long as 1 st joint, chela one and a half as 

 long as 1 st joint; carpus more slender than that of A. rapacida. 

 Meropodite of 3 rd legs unarmed, more slender than that of 

 A. rapacida, 6-times as long as broad, following joints 

 about as in this species. 



Largest specimen 17 mm. long, egg-bearing females 14 

 or 16 mm. 



10. Alpheus sibogae, n. sp. 



Station 49a. Lat. 8° 23'. 5 S., long. 119° 4'. 6 E. 



Sapeh-strait. Depth 70 M. 

 Station 51. Madura-bay and other localities in the 



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

 Station 305. Mid-channel in Solor-strait off Kampong 



Menanga. Depth 113 M. 



A remarkable new species of the group „brevirostris" 

 de M., of small size, the male being 12,5 mm. long, the 

 egg-bearing female 13,5 mm. 



Rostrum acute, narrow, reaching to the distal third of 

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

 carina sharp, continued to just behind the middle of the 



JNTotes from the Ley tieii Museum, Vol. XXX. 



