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The specimen from Stat. 49 a is 10,5 mm. long. The merus of third legs is 3,9-times as 

 long as broad like in the type and the 5 spinules on the distal half are of a somewhat more 

 slender form than in the specimens taken off Banda ; carpus and propodus are also a little 

 more slender, the propodus almost 7-times as long as wide, with 1 1 spinules on the posterior 

 margin and, with regard to the merus, a little longer than in the specimens from Banda; 

 dactylus as in the latter, though 3-times as long as broad at the base. Merus of fourth legs 

 4-times as long as wide, being even a little shorter than the propodus, the propodus being 

 1,5 mm. long, the merus 1,45111111.; propodus 7-times as long as wide. 



Remarks. The variety oxyceros Cout. is related to this one, but the principal claw 

 of the dactylus is less oblique, the lower spine of the basicerite reaches the end of the second 

 antennular article and the terminal spine of the scaphocerite extends far beyond the tip of the 

 carpocerite. 



f 1 7 b. Synalpheus Nilandensis Cout. var. oxyceros Cout. 



Synalpheus Nilandensis var. oxyceros H. Coutière, Alpheidae Mald. and Laccad. Archip. 1905, 

 p. 871, PI. LXX, Fig. 5, s«. 



Stat. 282. January 15/17. 8°25'.2S., i27°i8'.4E. Anchorage between Nusa Besi and the N.E.- 

 point of Timor. 27 — 54 m. Sand, coral and Lithothamnion. 1 egg-bearing female. 



It is with some doubt that this specimen, which is 9,5 mm. long, is referred to the 

 variety oxyceros. The rostrum reaches to the end of first antennular article, the orbital spines 

 which are directed straightly forward, are half as long ; different from the typical species and from 

 the variety bandaensis, the rostrum and the orbital spines are not curved upward at their 

 tips. Second article of antennular peduncle very slightly more than half as long as the visible 

 part of the first, a little broader than long; third article as long as second. Stylocerite reachino- 

 to the middle of second article. The inferior spine of the basicerite extends to the apex of 

 second antennular article, upper spine hardly longer than the orbital spines. Carpocerite little 

 longer than the antennular peduncle ; the terminal spine of the scaphocerite extends with a little 

 more than one-third of its length beyond the scale and it surpasses the antennular peduncle by 

 the whole length of the third article. Telson 2,5-times as long as the posterior margin is broad, 

 the latter half as- broad as the greatest width; outer angles of the posterior margin spiniform, 

 reaching almost to the middle of the prominent median part. Spinules of the upper surface 

 large, 0,16 mm. long, arranged as in the variety bandaensis. 



The external maxillipeds project with one-third their terminal joint beyond the carpocerite. 



The large cheliped resembles that of Syu. neomcris (J. G. de Man, in: Zool. Jahrb. X, 

 Abth. f. Syst. 1897, PI. 35, Fig. 61a), but the palm is unarmed at the distal extremity; the 

 fingers are therefore a little longer than in the variety bandaensis. 



Second legs as in this variety. The fourth legs (the third are missing) and the fifth also 

 fully accord with those of the variety bandaensis. Merus of fourth legs with 2 sjoinules just beyond 

 the middle, long 0,08 mm., the merus 3,52-times as long as wide; carpus 2,1 7-times as long 

 as thick, propodus a little shorter than the merus, 5, 7-times as long as wide, with 7 spinules. 



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