ALPHEUS HA1LST0NEI. 



99 



Station 303. Haingsisi, Saoiau-island. Depth up to 36 M. 

 Station 310. Lat. 8°30' S., long. 1 19°7'.5 E. Depth 73 M. 



This variety differs from the typical species inhabiting 

 the Laccadive Archipelago by the dactyli of the three pos- 

 terior legs that are armed, at about the distal fourth of 

 their posterior margin, with a small accessory claw, whereas 

 their anterior margin, a little farther distant from the 

 extremity, carries a small tooth or spine, lying contiguous 

 to that margin and at the base of which a few setae are 

 inserted. Upper margin of meropodite of larger chelipede 

 with 4 or 5, inner margin with 8 or 9 movable spinules ; 

 larger chela in adult specimens slightly broader (higher) 

 than in the typical form. Fourth joint of carpus of 2 nd 

 legs distinctly shorter than the 2 nd and in a less degree 

 also than the 5th. Propodites of 3 rd and 4th ] e g S — 

 times as long as the carpopodites. 



Length 15 mm. 



2. Alpheus Hailstonei Cout., var. assimulans, n. 



Station 260. Lat. 5°36'.5 S., long. 132°55 , .2 E. 



2,3 miles N. 63° W. from the North point of 



Nuhu Jaan, Kei-islands. Depth 90 M. 

 Station 282. Lat. 8°25'.2 S., long. 127°18'.4 E. 



Anchorage between Nusa Besi and the N. E. point 



of Timor. Depth 27—54 M. 

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



Menanga. Depth 113 M. 



Closely related to the typical species and perhaps not 

 different at all. 



Second joint of antennular peduncle one aud a half as 

 long as the visible part of the 1 st and 2 1 / 2 -times as long 

 as the 3 rd , stylocerite reaching to the end of 1 st joint; 

 carpocerite just as long as antennular peduncle, scaphocerite 

 also as long as the latter or hardly longer. Inner margin 

 of meropodite of larger chelipede with 4 — 6 small spinules; 



Notes from the Leyden Museum, Vol. XXX. 



