298 



Telson 3 times as long and twice as wide auteriorly as tbe 

 posterior margin is broad, tbe latter not rauch prominent, witb 

 tbe outer angles acute, tbougb very small. Rostrum reacbing 

 alraost to tbe raiddle of visible part of Ist antennular article, 

 lateral teetb triangular, subacute, balf as long as tbe rostrum. 

 Antennular peduncle and carpocerite ratber slender, tbe former 

 5,4 times, tbe latter 5,65 times longer tban tbick ; visible part 

 of basal article one and a balf as long as tbe 2nd and twice as 

 long as tbe 3rd ; stylocerite as long as Ist article. Terminal spine 

 of scapbocerite reacbing to midway between tbe tips of tbe two 

 peduncles, scale reacbing to tbe extremity of median article; spine 

 at upper angle of basicerite well developped. 



Larger chela 2,53 times longer tban bigb, anterior margin of 

 tbe palm witb two tubercles, tbe inner twice as large as tbe outer. 

 Small cbela 3 times as long as bigb, fingers tapering, stout. 



Second and following legs of a stout sbape. Relative dimensions 

 of 3rd legs, tbat closely resemble tbose of Syn. pachymeris Cout. : 

 Meropodite 3, carpus 1, propodite 1,84. Meropodite 3,4 times 

 longer tban wide witb 8 slender spinules and witb setae on tbe 

 distal balf of posterior margin ; propodite 4,3 times longer tban 

 wide, witb 8 spinules. Meropodite of 4tb pair unarmed. 



Lengtb of tbe single specimen collected 12,5 mm. 



12. Synalpbeus quadrispinosus, n. sp. 



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



Deptb 70 M. 



Station 164. Lat. 1° 42'. 5 S., long. 130° 47'. 5 E. Deptb 32 M. 



Station 273. Ancborage off Pulu Jedan, East coast of Aru- 



islands. (Pearl-banks). Deptb 13 M. 



Station 310. Lat. 8° 30' 3., long 119° 7'. 5 E. Deptb 73 M. 



Station 315. Ancborage East of Sailus Besar, Paternoster- 



islands. Deptb up to 36 M. 



A new species of tbe Biungukulatus-grou^, distinguisbed, like 

 also Syn. quadridens., n. sp., from all otber species of tbis genus 

 by tbe posterior margin of 6tb abdorainal somite being arrced 



