'63 



f 24. Synalpheus Jiastilicrassus Cout. 



Synalpheus liastilicrassus H. Coutière, Alpheida; Mald. and Laccad. Archip. 1905, p. 875, 

 PI. LXXII, fig. 12. 



Stat. 91. June 22. Muaras-reef, inner side; near east coast of Borneo. 2 specimens without 



chelipeds, one of which with eggs. 

 Stat. 115. July 9/1 1. East side of Pajunga Island, Kvvandang-bay. Reef. 1 female with eggs. 

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



small stones and shells. 1 young specimen. 

 Stat. 250. December 6jy. Kur-island. 27 m. Coral and Lithothamnion. 1 young specimen. 

 Stat. 260. December 16 and iS. 5°36'.5 S., i32°55'.2E. 2,3 miles N., 63 W. from the North 



point of Nuhu Jaan, Kei-islands. 90 m. Sand, coral and shells. 1 ova-bearing female. 

 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 male and 2 young 



specimens. 

 Stat. 285. January 18. 8°39'.iS., I27°4'.4E. Anchorage South coast of Timor. 34 m. Litho- 

 thamnion. 1 ova-bearing female. 

 Stat. 299. January 27/29. io°52'.4S., I23°i'.iE. Buka- or Cyrus-bay, South-coast of Rotti- 



island. Depth up to 36 m. Coral and Lithothamnion. 1 specimen, with a parasite 



between the pleopods. 



The specimens from Stat. 282 fully agree with the description and with the figures ot 

 Coutière. The largest specimen is a male, long 10 mm. Antennal region as in Fig. 12, but 

 the orbital spines project straightly forward. Telson resembling Fig. 12 d, just twice as long as 

 the distance between the postero-lateral spines, proportion between that distance and the greatest 

 width 1,7. Spinules of the anterior pair 0,19 mm. long, those of the posterior 0,23 mm.; the 

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

 of the anterior pair from the posterior margin 1,55, proportion between the distances of both 

 pairs from the posterior margin 1,6. The postero-lateral spines are barely longer than the 

 median part of the posterior margin and the long, inner spinules are hardly more than half 

 as long as the distance between the spiniform outer angles. 



Merus of large cheliped 2,1-times, that of the smaller just 3-times longer than wide 

 and in either of them the upper margin is obtuse, unarmed at apex. Relative proportions of 

 the large chela: fmgers i; total length 4,2; height 1,5. This chela is 3-times as long as the 

 other, the relative dimensions of which are: fingers i; total length 3,1; height 1,12. Merus 

 of second legs 6-times as long as wide. The flrst carpal segment, 4,8-times longer than thick, 

 is a little longer than the sum of the four following that, taken together, appear as long as the 

 chela; the second article is a little longer than the third or the fourth that are equal, fingers 

 somewhat more than one and a half as long as the palm. 



Relative dimensions of the third legs: merus 2,72; carpus t; propodus 2,1. Merus 4,1- 

 times longer than wide and 1,27-times longer than the propodus which is slender, 6-times as 

 long as wide and armed with 1 1 spinules, that are o, 1 mm. long. Dactylus one-sixth the length 

 of the propodus, 2,5-times longer than wide, when measured to the extremity of the ventral 

 hook; ventral hook one-fifth the whole length of the dactylus, dorsal hook but a little longer 

 and thicker than the other. 



The ova-bearing female from Stat. 115, long 10,5 mm., does not fully agree with the 



131 



