2IO 



chela very small, its length being only one-third that of the larger, fïngers just half as long 

 as the palm, vvhich is unarmed and twice as long as high. 



First carpal segment of 2 nd legs 5-times as long as thick, 1,2 mm. long, slightly shorter 

 than the sum (1,4 ram.) of the four following segments; the three following subequal, the fifth 

 as long as the third and the fourth taken together; the chela, the fingers of which are longer 

 than the palm, is somewhat more than one and a half as long as the fifth segment. 



Merus of third legs 5, 5-times as long as broad, armed with a rather small, acute 

 t o o t h at the distal end of posterior margin ; carpus almost 3-times as long as thick distally, 

 with a small spinule, long 0,09 mm., at the far end of the posterior margin. Propodus twice as 

 long as the carpus, almost 7-times as long as broad, its posterior margin presenting 16 small 

 spinules; dactylus one-fifth the propodus, of a rather stout shape, 3-times as long as broad at 

 base, with a small, ventral, accessory claw that is half as long and half as broad as the 

 principal and that makes an obtuse angle with the posterior margin. Apical tooth of the merus 

 of 4 th legs smaller than that of the 3 rd , merus of 5 th legs unarmed. 



Eggs few in number, ovoid, large; those of the female from Stat. Ó5 a are 1 mm. 

 long, whereas the eggs of the specimens taken at the Stations 289 and 260 are respectively 

 0,75 mm. and 0,7 mm. long. 



Length of the ova-bearing female 1 5 mm., the three females are of the same size. 



f 4. Synalpheus carinahis (de Man). 



Alpkeus carinatus J. G. de Man, in: Archiv f. Naturg. Bd. 53. 1888, p. 508, PI. XXII, fig. 2. 

 Alplieus carinatus L. Zehntner, Crustacés de 1' Archipel Malais, Genève 1894, p. 201. 

 Alpkeus carinatus H. Coutière, in: Notes from the Leyden Museum, Vol. XIX, 1898, p. 206. 

 Nee: Synalpheus carinatus J. Pearson, On the Macrura, in: Herdman's Report on the Pearl 

 Oyster Fisheries, 1905, p. 83, PI. II, fig. 9. 



Stat. 33. March 24/26. Bay of Pidjot, Lombok. 9 — 22 m. Mud, coral and coralsand. 1 ova- 

 bearing female of medium size and 1 still younger male. 



Stat. 181. September 5/1 1. Ambon-anchorage. Reef. 1 adult, ova-bearing female. 



Stat. 282. January 15/17. 8°25'.2 S., I27°i8'.4E. Anchorage between Nusa Besi and the N.E.- 

 point of Timor. 27 — 54 m. Sand, coral and Lithothamnion. 1 young female 

 without eggs and 1 still younger male. 



Stat. 315. February 17/18. Anchorage East of Sailus Besar, Paternoster-islands. Depth up to 

 36 m. Coral and Lithothamnion. 1 very young specimen. 



The adult female from Amboina is 34 mm. long from tip of rostrum to the end of the 

 telson. The rostrum hardly reaches beyond the 2 nd antennular article and is very slightly 

 upturned at the tip ; rostral carina sharp, prominent, reaching to near the posterior margin of 

 the carapace and distinctly notched at the limit between the gastric and cardiac regions. Orbital 

 spines half as long as the rostrum, parallel and directed obliquely upward; their carinae are 

 traceable to beyond the micldle of the carapace, but they are obtuse and much less prominent 

 than the median carina; the inner, lower margin of the left orbital spine bears two acute 

 teeth, an abnormality indeed, for in this species the orbital spines are simple and unarmed. 



The pleura of the 4 th — 6 th somites end in a pointed tooth. Telson 3,41-times as long 

 (4,3 mm.) as its posterior margin is broad (1,26 mm.), its greatest width (2,76 mm.) a little 



78 



