299 



with four acute teeth, two at the outer augles aud two submediau ; 

 the external teeth are spiuiform aud twice as long as the sub- 

 median ones. Telsoo as iu St/n. biunguiculatus (Stimps.) Coutière 

 (in: Fauna Mald. and Lacead. Archip. 1905, PI. LXXI, Fig. 8d), 

 but the posterior margin less prominent thau on that figure. 



Frontal and antennal region as in that species (Coutière, 1. c. 

 Fig. 8), but the rostrum 3 times as long as wide in the middle, 

 the stylocerite reaching almost to the middle or just beyond the 

 middle of median article and the narrow scale of the scaphocerite 

 extending to the middle of 3rd article. Relative dimensions of 

 large chela : Fingers 1, total length 3,77 — 3,8, height 1,38— 1,39, 

 this chela 2,72 — 2,75 times as long as high. Anterior margin 

 with an obtuse, fiattened tubercle, that in young specimens appears 

 rather acute. Large chela 2,7 times longer than the other. Relative 

 dimensions of small chela: Fingers 1; total length 3 — 3,2; height 

 0,86 — 0,93, this chela 3,42 — 3,46 times longer than high. Fingers 

 as in Syn. biunguiculatus, the outer margin of the dactylus fringed 

 with long, stiff setae. 



First segment of carpus of 2ud legs 3,7 — 4 times as long as 

 thick distally, as long as the sum of the four following. Third legs 

 as in Syn. biunguiculatus, dactylus '/. — '/^ the length of the 

 propodite, dorsal hook a little longer and a little more slender 

 than the ventral, the notch between both hooks concave at base, 

 anterior margin of ventral hook perpendicular to the posterior 

 margin of the dactylus. 



Ova numerous, large, 1,25 — 1,5 mm. long. 



Length of ova-bearing female 16 — 23 mm. 



13. Synalpheus quadridens, n. sp. 



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. 



As in Sy7i. guadrispinosus, n. sp., in this species that also be- 

 longs to the Biunguiculatus-group, the posterior margin of 6th 

 abdomiual somite is armed, in the same raanner, loith four trian- 



