248 



ji7«- Synalpheus Nilandensis Cout. var. bandaensis de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1909, p. 121. 



Stat. 49'. April 14. 8°23'.5S., H9°4'.6E. Sapeh-Strait. 70 m. Coral and shells. 1 specimen 

 without large cheliped. 



Stat. 240. November 22 till December 1. Banda. Lithothamnion-bank in 18 — 36 m. 2 speci- 

 mens, the larger of which with eggs. 



This variety is especially characterized by the shape of the dactyli of the 

 three posterior legs. 



The egg-bearing female is 14 mm. long, eggs not numerous, large, ovoid, o,S mm. long. 

 The terminal spine of the scaphocerite, though distinctly longer than the antennular peduncle, 

 does not quite reach to the apex of the carpocerite. In a lateral aspect the upper spine of the 

 basicerite appears almost half as long as the lower, but, when the animal is looked at from 

 above, the upper spine which is directed upward, appears comparatively shorter. 



Telson 2,83-times as long as the posterior margin is wide, greatest width, anteriorly, 

 2,1-times as broad as the posterior margin, which resembles that of the type (Coutière, 1. c. 

 Fig. 4^); spinules of the upper surface large, 0,2 mm. long, anterior pair one and a half as 

 far distant from the posterior margin as from the base, posterior pair one-third farther distant 

 from the posterior margin as from the anterior pair. 



The external maxillipeds extend with two-fifths of their terminal joint beyond the apex 

 of the carpocerite. Merus of large cheliped with a small, acute tooth at the end of the upper 

 margin. The chela resembles that of Syu. neomeris (J. G. de Man, in: Zool. Jahrb. X. Abth. 

 f. Syst. 1897, PI. 35, Fig. 610), but the fmgers are shorter, measuring one-third of the 

 palm. The upper border of the palm of the small chela appears more regularly arcuate than 

 in Coutière' s figure \a. 



Second legs as in the typical species. The measurements of the third legs agree, with 

 regard to the length of their joints, with those of the typical species; the merus is 3,75-times 

 as long as wide and bears 4 spinules (in the other specimen from Banda the merus bears 5 

 spinules and the proportion between length and width is 3,65); the propodus appears in the 

 female 6,2-times, in the other specimen 6,5-times as long as broad and is armed with 9 spinules. 

 The dactylus has another form than in the type species. When it is measured, along the 

 anterior margin, from the propodal articulation to the end of the dorsal hook, the dactylus 

 appears 2,5-times as long as broad at its base and it shows therefore a less stout form 

 than in the typical species; the principal claw, though its form is the same as in the latter, is 

 directed obliquely forward, making no right angle with the anterior margin, and the 

 dorsal hook is stronger and measures two-thirds the length of the principal one. 



Propodus of the fourth legs hardly shorter than the merus, the latter with 2 spinules-, 

 in the typical species the length of the merus is in proportion to that of the propodus as 

 11 : 10, in this female, however, the propodus is 1,65 mm. long, the merus 1,7 mm. In the 

 other specimen from Banda, long 11,5 mm., the stylocerite reaches to the middle of second 



antennular article. Thoracic legs as in the female. 



116 



