349 



f 14- Alpheus malleodigihis (Sp. Bate) var. gracilicarptis de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1909, p. 99. 



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



8 — 10 m. Dead coral; Halimeda; Lithothamnion. I young female. 

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



nion-bottom, sand and coral, i young male, the larger chela of which encloses 



a Bopyrid. 

 Stat. 99. June 28/29/30. 6°7'.5 N., 120° 26' E. Anchorage off North-Ubian. 16 — 23 m. Litho- 



thamnion-bottom. i young male. 

 Stat. 282. January 15/17. 8°25'.2S., 127° 18'. 4 E. Anchorage between Nusa Besi and the N.E.- 



point of Timor. 27 — 54 m. Sand, coral and Lithothamnion. 3 specimens of medium 



size, one of which is ova-bearing. 



In these specimens the carpal segments of the longer leg show a more slender form 

 than in the typical species, the carpus of the 3'^'^ legs appears also a little more slender and 

 longer with regard to the propodus. Therefore these specimens are described as a variety. 



The specimens from Stat. 282 are of medium size, about 15 mm. long. In the ova-bearing 

 female the 2°*^ antennular article, 2,5-times as long as the visible part of the i^', appears 

 very slender, 5,5-times as long as thick in the middle, both extremities being somewhat swollen; 

 3'''^ article a little longer than the visible part of the i^', half as long as the 2°^^, just as in the 

 typical form. Carpocerite reaching to the end of 2°<i article, scaphocerite almost to the distal third 

 part. The carpal joints of the longer (right) leg of the 2°'^ pair are 1,7 mm., 2,5 mm., o,S mm., 

 1,12 mm. and 1,3 mm. long; the chela 1,65 mm. long (palm 0,9 mm., fingers 0,75 mm.). 

 Those of the other leg are 1,4 mm., 1,9 mm., 0,56 mm., 0,66 mm. and 0,9 mm. long, chela 

 1,5 mm. long (palm 0,9 mm., fingers 0,6 mm.). The 4* segment appears, in the right leg, 

 5,6-times, in the left 2,64-times as long as thick in the middle; in the young specimen from 

 Stat. 99 the 4* segment of the longer leg is 5-times and in that from Stat. 93 5,5-times as 

 long as thick, the \^'^ segment of the shorter leg in the former 2,2-times, in the latter 1,85-times 

 as long as thick. 



Merus of i^^ legs in the ova-bearing female from Stat. 282 4,3-times, in the young 

 specimens from the stations 93 and 99 4, 5-times as long as broad; the carpus appears in the 

 female from Stat. 282 5,6-times, in the young specimen from Stat. 99 5-times and in that from 

 Stat. 93 5,8-times as long as thick in the middle, presenting a more slender form than in 

 the typical species; it appears also somewhat longer with regard to the propodus, the 

 proportion being in these specimens 1,33 — 1,35, instead of 1,25 as in the typical species. 

 In one of the specimens from Stat. 282 the carpocerite reaches only to the distal fourth part 

 of 2nd antennular article. 



715. Alpheus sp. 



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

 8 m. Dead coral; Halimeda; Lithothamnion. i female with eggs. 



I do not succeed in identifying this specimen with any one of the known species, but I 



217 



SIBOGAEXPEDITIE XXXIX a'. 45 



