334 



palm. So e. g. in a large specimen from Stat. 154 the carpal segments are 1,8 mm., 0,88 mm,. 

 0,52 mm., 0,7 mm. and 0,8 mm. long, the chela is 1,1 mm. long (palm 0,42 mm., fingers 

 0,68 mm.); in the adult, ova-bearing female from Stat. 282 these numbers are: 1,5 mm., 

 0,8 mm., 0,5 mm., 0,66 mm. and 0,75 mm., the chela is 1,04 mm. long (palm 0,4 mm., fingers 

 0,64 mm.); in another younger individual from the same locality the carpal segments are 1,1 mm., 

 0,58 mm., 0,36 mm., 0,48 mm. and 0,52 mm. long; the chela is 0,82 mm. long (palm 0,32 mm., 

 fingers 0,5 mm.). In an adult, ova-bearing female, finally, from Stat. 310 the carpal segments 

 are 1,7 mm., 0,9 mm., 0,5 mm., 0,7 mm. and 0,82 mm. long; the chela is 1,18 mm. long 

 (palm 0,51 mm., fingers 0,67 mm.). 



This variety is at once distinguished by the dactyli of the three posterior legs. In the 

 typical form the propodi of the 3 rd and 4 th legs are said to be one and a half as long as the 

 carpi. In this variety the specimens show a great variability, the propodi being i 1 /,, — i^-times 

 as long as the carpi. In the adult, ova-bearing female from Stat. 282 the carpus of 3 rd legs is 

 1,4 mm. long, the propodus 2,1 mm.; in the ova-bearing female, long 12 mm., from Stat. 285 

 these numbers are 1,3 mm. and 1,9 mm.; in a specimen from Stat. 154 the carpus is 1,7 mm. 

 long, the propodus 2,4 mm., not yet one and a half as long and in the adult, ova-bearing 

 females from Stat. 310 the propodus (2,4 mm.) is but one-third longer than the carpus (1,8 mm.). 

 In adult individuals the posterior margin of the propodus bears 8 spinules and one or two 

 setiform spinules occur at the far end of the anterior margin. In Coutière's figure 18 c the 

 merus appears 11-times as long as wide; in an adult male from Stat 154 the merus of 3 rd legs 

 is 8-times as long (2,8 mm.) as broad (0,35 mm.) and in the adult, ova-bearing female from 

 Stat. 282 6,6-times, this joint being 2,3 mm. long and 0,35 mm. broad. Nothing is said in 

 Coutière's description about the dactyli, but in the figure 18c the dactylus appears simple. In 

 this variety the dactylus, which is slightly longer than one-fourth of the propodus, is armed, 

 at about one-fourth of its length from the tip, with a small, acute accessory claw 

 on the posterior margin ; the length of this claw measures one-sixth of the distance between 

 it and the extremity of the dactylus. A little farther distant from the extremity the anterior 

 margin presents also an acute tooth or spine, situated close to the margin and therefore 

 rather indistinct, while, at its base, at each side two or three stout setae are inserted. 



y 3. Alphetis colhimiamis Stimps. 



W. STIMPSON, Proc. Acad. Nat. Scienc. Philadelphia, 1860, p. 30. 



A. Ortmann, Zool. Jahrb. V. Abth. f. Syst. 1S90, p. 4S3, Taf. XXXVI, Fig. 15 k, \^m. 



H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. SSi. 



Stat. 66. May 7/8. Bank between islands of Bahuluwang and Tambolungan, south of Saleyer. 

 8 to 10 m. Dead coral; Halimeda; Lithothamnion. 1 adult male, without the 

 large cheliped. 



Stat. 78. June 10/11. Lumu-Lumu-shoal, Borneo-bank. Reef. 1 adult female with eggs. 



Stat. 93. June 24/25. Pulu Sanguisiapo, Tawi-Tawi-islands, Sulu-archipelago. 12 m. Litho- 

 thamnion, sand and coral. 1 adult female with eggs and one young specimen. 



Stat. 96. June 27. South-east side of Pearl-bank, Sulu-archipelago. 15 m. Lithothamnion. 

 1 ova-bearing female and 3 young specimens. 



202 



