362 



Merus unarmed, little more than twice as long as broad, with the upper margin strongly 

 arcuate. Carpus longer than in the male, almost twice as long as broad near the articulation 

 with the chela. Chela resembling that of the female of A. ducephahis; viewed at from the 

 upper side, the chela appears 3,5-times as long as broad near the carpal articulation; it 

 reo-ularly narrows towards the extremity of the fingers that are narrow, conical and little 

 shorter than the palm, the palm being in proportion to the fingers as 13:10. Carpus of 

 second leo-s similar to that of A. bucephahis. In the adult male from Stat. 78 the carpal 

 segments of the right leg are 0,7 mm., 1,9 mm., 0,44 mm., 0,48 mm. and 0,8 mm. long, the 

 2"'^ seo-ment, 0,25 mm. thick, is about 8-times as long as thick; chela 1,16 mm. long (palm 

 0,56 mm., fingers 0,6 mm.). In the left leg the carpal segments are 0,64 mm., 1,7 mm., 0,42 mm., 

 0,46 mm. and 0,72 mm. long; the chela is 1,12 mm. long (palm 0,56 mm., fingers 0,56 mm.). 

 The carpal segments of the right leg of the adult female from Stat. 315 are 0,6 mm., 1,44 mm., 

 0,36 mm., 0,32 mm. and 0,56 mm. long; the chela is 1,05 mm. long (palm 0,5 mm., fingers 

 0,55mm.); in the left leg these numbers are: 0,57mm., 1,3mm., 0,34mm., 0,32mm. and 

 0,54 mm.; the chela is 1,04 mm. long (palm 0,48 mm., fingers 0,56 mm.). In the adult male 

 the second segment appears almost 3-times, in the adult female somewhat more than twice as 

 loner as the first and the fifth segment appears in the male slightly longer than the first, in 

 the female both are equal. 



Ischium of ^""^ and 4'^^ legs armed with a strong movable spine. Merus of 3'^<^' legs 4- 

 times as long as broad in the middle, armed with a strong, acute, subapical tooth; upper 

 maro-in straight, with very short setae along its whole length and with 2 or 3 longer ones 

 at the distal end, lower margin with 3 or 4 short setae. Carpus half as long as the merus, 

 lower maroin straight, terminating in a strong tooth at the distal end, without spinules and 

 o-labrous; upper margin with long setae that are arranged in tufts of two or three. Propodus 

 one-fifth longer than the carpus, with 6 pairs of movable spines along its posterior border, close 

 to each of which two setae are inserted; upper margin with long setae and with a slender, 

 though feeble spine at the distal end. Dactylus slender, slightly curved, measuring one-third 

 of the propodus and without accessory claw. Merus of 4"^ legs with a subapical tooth which 

 is comparatively as large as that of the 3"^. 



Whereas the male of A. consobrinns differs at first sight from that of A. bucephalus 

 by the small cheliped, the female can be distinguished by the scaphocerite being longer than 

 the carpocerite, by the spine on the basicerite, by the merus of the larger cheliped presenting 

 a tooth on its inner margin and by the shape of the telson. 



23. Alpheus spongiar7tin Cout. 



Alpheus spongiarum H. Coutiere, in: Bull. Museum Paris. 1897. W 6. p. 236 and 1900. N" 8. p. 413. 

 Alpheus spongiarum H. Coutiere, Les "Alpheidae", Morphologic externe et interne, formes 



larvaires, Bionomie. Paris 1899. p. 147. fig. 141. 

 Alpheus spongiarum J. Pearson. Ceylon Pearl Oyster Report. Macrura. 1905. p. 85. 



Stat. 115. July 9/1 1. East-side of Pajunga-island. Kwandang-bay. Reef, i male. 

 Stat. 133. July 25/27. Anchorage off Lirung, Salibabu-island. 36 m. Mud and hard sand, i male. 



230 



