343 



of the small chela are a little longer than the palm, more distinctly in the youngest 

 specimen than in the other. The second legs are missing in both specimens, the following 

 appear a little more slender than in the adult. So, for instance, the meri of the 3 rd legs 

 are 6-times as long as wide, the carpus, half as long as the merus, is 5-times as long as thick; 

 the propodus, 1,55-times as long as the carpus, is 9-times as long as broad and bears in the 

 specimen from Pajunga-Island seven, in the other six spinules; the dactylus, finally, measures 

 one-third of the propodus. 



Remarks. A. aglaopheniae Borr. differs i° by the eye-hoods being acute in front, but 

 not armed with a spine, 2 by the shorter stylocerite, 3 by the lower border of the large chela 

 being notched, 4 by the dactyli of the three posterior legs being biunguiculate etc. A. splendidus 

 Cout., of which by the courtesy of Professor Coutière I was enabled to examine the Djibouti 

 type, differs at first sight by the orbital spines arising from the upper sur f ace of the 

 eye-hoods, at some distance from their arcuate, antenor margin, whereas one observes no 

 prominence between the rostrum and the eye-hoods. The rostrum is obliquely directed upward, 

 the stylocerite a little shorter and the groove on the upper border of the palm is much less 

 conspicuous. 



9. Alp keus macrochirus Richters. 



F. Richters, Decapoda der Insel Mauritius und der Seychellen, 1880, p. 164, Taf. XVII, 



Fig. 31—33- 

 A. ORTMANN, in: Zoolog. Jahrb. V, Abth. f. Syst. 1890, p. 485 and in: Jenaische Denk- 



schriften, VIII, 1894, p. 15. 

 J. G. DE Man, in: Abhandl. Senckenb. Naturf. Gesell. XXV, 1902, p. 863. 

 Nee: Alpheus macrochirus J. G. de Man, in: Archiv f. Naturgeschichte, 1888, p. 519. 

 Confer also: H. Coutière, Les "Alpheidae", Paris, 1899, p. 87, Fig. 51 — 53 and p. 218 — 221, 



Fig. 261. 



Stat. 60. April 27/28. Haingsisi, Samau Island, Timor. Reef. 1 male. 

 Stat. 79''. June 12/13. Pulu Kabala-dua, Borneo-bank. Reef. 1 male. 

 Stat. 193. September 13 14. Sanana-bay, East coast of Sula Besi. Reef. 1 male. 



The three specimens are all young, the largest, the male from Stat. 60, is 28 mm. long 

 from tip of rostrum to the end of the telson ; the two other males are much younger, A. macro- 

 chirus attains, however, a length of 45 mm. Both in the male from Haingsisi and in that from 

 Stat. 79 b the right cheliped is the larger, in the specimen from Stat. 193 both legs of the 

 i st pair are missing. 



With regard to the chelipeds I wish to remark that the upper border of the palm of 

 the smaller chela presents the same longitudinal groove as that of the larger. This groove, 

 broadest distally and gradually narrovving towards the proximal extremity, is a little hairy and 

 of the two ridges by which it is defined, the outer is entire but the inner is marked on its 

 distal half with three or four small, obtuse lobes or teeth. One observes at the distal extremity 

 of the inner ridge, i. e. at the base of the immobile finger, on the inner surface of the chela, 

 a sharp blue-coloured tooth directed forward and the tips of the fingers which are a little longer 

 than the palm, are also blue-coloured. On the larger chela not only the longitudinal groove 



