3 8o 



spinules; following joints as in the 3 rd legs, but the lower margin of the carpus ends in an 

 acute tooth. 



Length of the single, probably young specimen, 14 mm. 



Remarks. Alpheus Mier si Cout. differs at first sight by the less slender form of 

 the carpal segments and by the meri of 3 ld and 4 th legs bearing no movable spinules. The 

 unknown large chela will perhaps show still other differences, also from A. Lanceloti. 



n -7 



00- 



Alpheus gracilipes Stimps. 



Alpheus gracilipes W. Stimpson, in: Proc. Acad. Nat. Scienc. Philadelphia, 1860, p. 31. 

 Alpheus gracilipes E. J. Miers, in: Report Zool. Coll. of H. M. S. "Alert", 18S4, p. 287. 

 Alpheus gracilipes J. G. de Man, in: Archiv f. Naturg., 53. Jahrg. 1888, p. 500, Taf. XXI, 



fig. 5 and in: Abhandl. Senckenb. Naturf. Gesells. Bd. XXV, 1902, p. 864. 

 Alpheus gracilipes A. Ortmann, in: Zoolog. Jahrb. V, Abth. f. Syst. 1890, p. 488 and in: 



Jenaische Denkschriften VIII, 1894, p. 15. 

 Alpheus gracilipes H. Coutière, Alpheidae Mald. and Laccad. Archip. 1905, p. 901. 

 Nee: Alpheus gracilipes J. Thallwitz, Decapoden-Studien. Berlin, 1891, p. 21. 



Stat. 115. July 9/1 1. East side of Pajunga-island, Kwandang-bay. Reef. 4 specimens, 2 of 



which are egg-bearing. 

 Stat. 152. August 12/13. Wunoh-bay, N.W. coast of Waigeu-island. Reef. 1 young specimen. 

 Stat. 154. August 14. o°7'.2N., i30°25'.sE. Bougainville-strait. 83 m. Grey muddy sand, 



shells and Lithothamnion. 1 egg-bearing female. 

 Stat. 209. September 23. Anchorage off the south point of Kabaëna-island. 22 m. Coarse 



sand. 1 egg-bearing female. 



As in A. diadema Dana and A. insignis Heller, the antennal peduncle appears, in this 

 species, much shorter than the scaphocerite and reaches only to the tip of 2 Dd antennular article: 

 in other species of this subgroup, as in A. Lanceloti Cout., A. paracrinitus Miers var. 

 bengalensis Cout., A. alpheopsides Cout. and A. paralpheopsides Cout. the antennal peduncle 

 is longer than the scaphocerite. 



The largest specimen from Stat. 115 is a male, long 25,5 mm. The rostrum reaches to 

 the end of i st antennular article and its upper surface is decidedly concave. Only the small 

 cheliped, at the left side, is present. The upper margin of the merus ends in an acute tooth, 

 the outer margin is unarmed, but the inner bears 2 small spinules on its proximal half and 

 a sharp tooth at the distal end, which, however, is smaller than that of the upper maroïn. 

 The fingers are a little shorter than the palm, which is marked with a transverse groove just 

 behind the articulation of the dactylus; the latter presents the Balaenieeps-fovm and the chela 

 appears a little more than 4-times as long as broad (high). 



The two egg-bearing females are 20 mm. long. The female without eggs from Stat. 152 

 is 13111111. long. The large chela is not yet as slender as in the adult, being only about 3-times 

 as long as high. 



The female from Stat. 154 is 27,5 mm. long. There is a larg - e cheliped lying loose in 

 the tube, which 110 doubt belongs to this specimen. The upper margin of the merus ends in 

 a small sharp tooth, that is much smaller than the acute tooth at the apex of the inner 

 margin ; between this tooth and the ischium the inner margin bears 3 or 4 smaller spinules, 



24S 



