204 



o,42 mm. long, and inserted close to the lateral margins, are situated immediately behind 

 the middle and between the spinules one observes a shallow, median groove that does not 

 reach to the base of the telson. The inner uropod is rather narrow; in Zehntner's type it is 

 1,8-times, in the specimen from Stat. 303 1,7-times as long as broad. 



In the young specimen from Stat. 282 the large chela has a somewhat stouter form than 

 in those taken at the Stations 50 and 273, probably owing to its very young age. Whereas 

 in the adiJt specimens the i^' carpal segment of the second legs is longer than the sum of 

 the four following, in the young individuals one observes the contrary. 



In the specimens from the Stations 303 and 273 the meri of the 5"' pair are unarmed, 

 but in that from Stat. 282 they carry a small distal tooth as in the type; in the specimen from 

 Stat. 50 the legs of the 5* pair are missing. In Zehntner's type the merus of the legs of the 

 3''' pair is 5,7-times, in the specimen from Stat. 303 5,5-times and in the young specimen 

 from Stat. 273 5,3-times as long as broad; carpus a little less than half as long as the merus, 

 3-times as long as thick and in the type one observes three small spinules, long 0,2 mm., at 

 the far end of the posterior margin. Propodus twice as long as the carpus, in the type 8,5- 

 times, in the specimen from Stat. 303 7,7-times as long as broad; dactylus about one-si.xth the 

 propodus, strongly curved with a small and slender accessory claw on the posterior margin. 



The specimen from Stat. 303 is 24,5 mm. long, those from the Stations 50, 273 and 

 282 are respectively 15,5 mm., 14 mm. and 11 mm. long. 



General distribution: Amboina (Zehntner). 



f 2. Synalpheus consobrintts de Man. 



J. G. de Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1909, p. iii. 



Stat. 91. June 22. Muaras-reef, inner side, east coast of Borneo. 2 specimens, one of which 



with eggs. 

 Stat. 213. September 26 — October 26. Saleyer-anchorage. Reef, i specimen. 

 Stat. 282. January 15/17. 8°25'.2S., 127° 18'. 4 E. Anchorage between Nusa Besi and the N.E.- 



point of Timor. 27 — -54 m. Sand, coral and Lithothamnion. 2 specimens, one of 



which with eggs. 

 Stat. 305. February 8. Mid-channel in Solor-strait off Kampong Menanga. 113 m. Bottom 



stony. I young specimen. 

 East of Segli, north-coast of Sumatra, at a depth of 40 — 70 fathoms, i adult, egg-bearing 



female collected by Mr. J. W. VAN NoUHtJYS, May 1909. 



These specimens bear a close resemblance to Synalpheus Stinipsonii from Amboina 

 (J. G. de Man, in: Archiv f. Naturg. 53. Jahrg. 1888, p. 513, PI. XXII, fig. 3 — 3^), there 

 are, however, some differences so that I prefer to describe them as a new species. Unfortunately 

 they do not fully accord with one another. The specimen from Stat. 213, a male, is the largest 

 of all, 21 mm. long, and will be described as the type. 



Frontal region as in Syn. Stimpsonii, but the rostrum, that projects straight forward and 

 that is hardly longer than broad at its base, is shorter and reaches to the distal fourth or 

 fifth of the visible part of i^' antennular article; the slightly convergent, orbital spines measure 

 one-third the rostrum, as in Syn. Stimpsonii. Posterior angle of i^' and 2^^^ abdominal pleura 



