276 



leno-th, viz. 0,15 mm. long, and inserted near the lateral margins; the anterior pair a little 

 before the middle, the proportion between the length of the telson and the distance of the 

 anterior pair from the posterior margin being 1,64, whereas the proportion between the distances 

 of both pairs from the end of the telson is indicated by the number 1,74. 



In both chelipeds the upper margin of the merus ends in a small acute tooth at the 

 ape.x, the merus of the large cheliped is 2,6-times as long as wide, that of the other 3,53- 

 times. The large chela shows the following proportions: fingers (dactylus) i; total length 3,77; 

 heio-ht 1,18. The chela is 3,2-times as long as high and the anterior margin of the palm 

 terminates in an acute spiniform tooth, which is directed obliquely upward. The large 

 chela is 2,76-times as long as the smaller, which is 3,5-times as long as high; the proportions of 

 the smaller chela are: fingers i; total length 2,73; height 0,8. Palm unarmed distally, fingers 

 tapering; the dactylus is glabrous above, the fingers presenting only the usual setae along 

 their margins. 



Merus of second legs 5,3-times as long as wide, just as long as the telson. The first 

 segment of the carpus, that is 4-times as long as thick, appears a little shorter than the 

 sum of the four following, the proportion being as i : i , i ; the chela, the fingers of which are in 

 proportion to the palm as 7:5, appears as long as the four last carpal segments taken together. 



Following legs slender, resembling those of Syn. iiunguiculafus cxilipes Cout. Relative 

 dimensions of the third legs; merus 2,5; carpus i; propodus 2,2. Merus unarmed, slender, 4,8- 

 times as long as wide and 1,1 4-times longer than the propodus; the merus is just as long as 

 that of the small cheliped. Propodus also slender, 8-times as long as wide, with 10 rather short 

 spiiiules on the posterior margin that are 0,066 — 0,088 mm. long. When measured from the 

 base of the anterior margin to the tip of the ventral hook, the dactylus which is 2,6-times as 

 long as wide near the articulation, proves to measure almost one-seventh of the propodus. 

 The dactylus resembles that of the variety exilipes Cout. (H. Coutiere, I.e. Fig. \oa")\ the 

 ventral hook, which is one and a half as long as thick at its base, continues the lower margin 

 in a concave curve, but the dorsal hook which is about twice as long as thick at its base and 

 here slightly thicker than the other, appears just one and a half as long as the latter; 

 notch between the two hooks rounded at the base. Length of the single specimen 10,5 mm. 



732. Synalpheus bituberctilatiis de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1910, p. 294. 



Stat. 60. April 27/28. Haingsisi, Samau Island, Timor. Lithothamnion in 3 m. and less, i ova- 

 bearing female. 



Stat. 78. June lo/ii. Lumu-Lumu-shoal, Borneo-bank. Coralreef. i young specimen. 



Stat. 164. August 20. i°42'.5 S., I30°47'.5 E. Between Misool and New Guinea. 32 m. Sand, 

 small stones and shells. 4 adult specimens, the largest one ova-bearing. 



Stat. 184. September 11/12. Anchorage off Kampong Kelang, South coast of Manipa-island. 

 36 m. Coral and sand, i very young specimen. 



Stat. 273. December 23/26. Anchorage off Pulu Jedan, East coast of Aru-islands. (Pearl-banks). 

 1 3 m. Sand and shells. 6 specimens of medium size or still }-ounger, the largest 

 specimen with eggs. 



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