235 



The following legs are characteristic of this species. The merus of the third legs is 

 3,56-times as long as wide and armed with 2 spinules, long 0,1 — o, 12 mm., on the distal half 

 of the posterior margin; carpns 2,2-times as long as wide; propodus slender, slightly 

 a r c u a t e, 6, 7-times as long as wide and presenting only two small spinules, that are 

 0,1 mm. long, on the concave, posterior margin, besides two or three at the distal end; the 

 first of these spinules is inserted a little posterior, the other a little anterior to the middle. 

 Coutière figures 3 spinules instead of 2 on the posterior margin. The dactylus measures one- 

 fourth the propodus and has a rather stout shape, the proportion between its length and the 

 width at the base being 2,46. The conical ventral hook, that is hardly longer than broad at 

 its base, measures only one-eighth the length of the dactylus; the dorsal hook, the posterior 

 margin of which runs parallel with that of the other, is slightly longer, 3-times as long as 

 broad at its base and almost half as broad at its base as the ventral hook. This leg bears 

 only a few short setae, especially on the anterior margin of the joints. 



The fourth legs closely resemble the third, but the merus, 3,5-times as long as wide, 

 bears but one spinule long 0,066 mm. just in front of the middle and on the propodus, which 

 is 6,46-times as long as wide, the first of the two spinules that occur on the posterior margin 

 of the third legs, is wanting. The dactylus, finally, though for the rest agreeing, appears longer 

 than one-fourth of the propodus, the propodus being 1,68 mm. long, the dactylus 0,49 mm. In 

 the third legs the merus is 2,31-times, the propodus 2,44-times as long as the carpus; in the 

 fourth legs these numbers are, for the merus 2,11, for the propodus 2,4. In both legs the 

 dactyli show the same length, but, the propodus of the third legs being 1,1 3-times as long as 

 that of the fourth, the dactylus of the fourth appears comparatively longer. 



Eggs few in number, large, 1,3 — 1,4 mm. long, presenting two black eye-spots. 



General distribution: Holothuria Bank, X. W. Australia (Coutière); Macclesfield 

 Bank, Arafura Sea (Coutière); Albany passage, Torres Straits (Coutière). 



f14. Synalpheus Iocasta de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI. 1909, p. 119. 



Stat. 71. May 10 — June 7. Makassar and surroundings. Depth up to 32 m. Mud, sand with 



mud, coral. 1 ova-bearing female. 

 Stat. 116. July 12. o°58'.5N., I22°42'.5 E. West of Kwandang-bay-entrance. 72 m. Fine sand 



with mud. 2 specimens, one of which with eggs. 

 Stat. 144. August 7/9. Anchorage north of Salomakiëe-(Damar-)island. 45 m. Lithothamnion. 



I ova-bearing female. 

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



small stones and shells. 15 specimens, most of which are ova-bearing. 

 Stat. 204. September 20. 4°2o'S., I22°58'E. Between islands ofWowoni and Buton; northern 



entrance of Buton-strait. From 75 — 94 m. Sand with dead shells. 1 specimen. 

 Stat. 240. November 22 till December 1. Banda-anchorage. Lithothamnion- bank in 18 — 36 m. 



1 female with eggs. 

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



13 m. Sand and shells. 4 specimens, 2 of which with eggs. 

 Stat. 274. December 26. 5°28'.2S., I34°53'.9E. Off Pulu Jedan. 57 m. Sand and shells. 



Stones. 1 young specimen. 



103 



