434 



is broad; anterior pair of spinules one and a half as far distant from the posterior margin as 

 from the anterior. The telson shows a hairy groove in the mid-line and the lateral parts like 

 also the posterior part of the upper face are hairy. 



Infero-internal margin of the meri of both legs of i st pair with a spiniform tooth, which 

 on the merus of the larger cheliped is larger than on that of the other. The large chela 

 resembles the figure 2 of my cited paper, but the palm appears a little longer; this chela, 

 indeed, is 10,5 mm. long, the palm 6,8 mm. long and 4,5 mm. high (or broad), while the fingers 

 are 2,8 mm. high. The lobe on the upper border of the palm is subacute, that on the lower 

 rounded, obtuse. 



The small chela of the male fully agrees with Fig. 3 and the dactylus is, like the other 

 fino-er, hairy at the inner side, but presents no oblique hairy ridge, which occurs in 

 A. euchirus Dana. The small chela of the female is a little less high with regard to its length 

 and the fingers are slightly longer than the palm. 



Carpal joints of the 2 nd legs, in the male, 1,8 mm., 0,58 mm., 0,38 mm., 0,36 mm. and 

 0,62 mm. long, the chela 1,96111111. long (palm 0,86 mm., fingers 1,1 mm.); in this not yet 

 full-grown specimen the i st joint appears 3-times as long as the 2 nd and the latter still 

 slightly shorter than the 5 th . Ischium of 3 ld and 4 th legs with a movable spine. Merus 

 of 3 rd leo-s 3 -ti m es as long as broad, in the male 3,3111111. long and 1,04 mm. broad. 



General distribution: Mergui Archipelago (de Man) ; Rameswaram (Henderson) ; 

 Bay of Batavia (de Man); Amboina (de Man). 



68. Alpheus euchirus Dana. 



Alpheus euchirus J. D. Dana, U.S. Explor. Exped. Crustacea, p. 545, PI. 34, figs. 6a— f. 

 Alpheus euchirus H. Coutière, Les Alpheidae, 1899, p. 235, fig. 28S. 



Alpheus hippothoë de Man, var.? J. G. de Man, in: Zoolog. Jahrb. IX. Abth. f. Syst. 1897, 

 p. 754, Taf. 36, fig. 66 — 66c and in: Notes from the Leyden Museum, XX, 1898, p. 210. 



Stat. 7. March 11. 7°55'-5S., H4°26'E. Reef of Batjulmati, Java. 1 male and 1 female, 

 both young. 



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

 young specimen. 



Stat. 50. April 16/18. Bay of Badjo, West coast of Flores. Shore. 1 adult male. 



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

 1 3 m. Sand and shells. 1 male and 1 egg-bearing female, both adult. 



Stat. 299. January 27/29. iO°S2'.4S., I23°i'.iE. Buka- or Cyrus-bay, South-coast of Rotti- 

 island. Depth up to 36 m. Mud, coral and Lithothamnion. 1 very young female. 



Stat. 313. February 14/16. Anchorage East of Dangar Besar, Saleh-bay. Reef. 1 adult, egg- 

 bearing female. 



Stat. 322. February 24. i'/ 2 m 'l e south of Tandjong Lajar, South coast of Bawean-island. 

 32 m. Coral. 1 very young specimen. 



Balikpapan, east coast of Borneo. 1 egg-bearing female, collected by Mr. J. W. TlSSOT VAN 

 PATOT and preserved in the Zoological Museum of the University of Amsterdam. 



All these specimens belong to that form which in 1897 was regarded and described 

 by me as a variety of A. Hippothoë de Man ; at that time no specimens of the latter were 

 lying before me, but, as the typical A. Hippothoë is represented in the "Siboga" collection 



302 



