﻿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^/.,-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^^ legs twice or a little more 

 than twice as long as l^^t joint, chela one and a half as 

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

 Meropodite of S'^'^ 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 „hrev{rostris" 

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

 egg-bearing female 13,5 mm. 



Kostrum acute, narrow, reaching to the distal third of 

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

 carina sharp, continued to just behind the middle of the 



Notes from the Leyden IMuseuni, Vol. XXX. 



