346 



Telson 1,7mm. long, 0,85 mm. wide anteriorly, the posterior margin 0,28mm. broad; 

 the telson is 6-times as long as its posterior margin is wide and therefore narrows much 

 more backward than the telson of A. microstylus. In the young male from Station 144 

 of the typical species the telson appears only 4-times as long (2 mm.) as its posterior margin 

 is broad (0,5 mm.) and its greatest width is 1,16 mm. The larger cheliped closely resembles that 

 of the typical species, the palm of the smaller chela is one and a half as long as the fingers. 



Of the left leg of the 2"*^ pair, which is the longer, the carpal segments are 0,6 mm., 

 2,6 mm., 0,54 mm., 0,64 mm. and 0,84 mm. long; the chela is 1,22 mm. long (fingers 0,6 mm., 

 palm 0,62 mm.). For the right leg these numbers are, in the same succession, 0,4 mm., 1,42 mm., 

 0,36mm., 0,4 mm. and 0,54 mm.; the chela is 0,92 mm. long (fingers 0,42 mm., palm 0,5 mm.). 

 The 2°'^ segment appears in the longer leg more than 4-times, in the other 3,5-times as long 

 as the i^', being therefore longer than in A. microstylus-^ the carpus and the whole leg appear, 

 however, much more slender, the 2°'^ segment, indeed, of the left leg is, in the middle, 

 0,18 mm. thick, that of the right 0,16 mm., so that the 2^^ segment of the left leg is 1 4-times, 

 that of the right 9-times as long as thick. 



In the young specimen, however, of A. microstyhis from Stat. 144, which is 13 mm. 

 long, the 2"<i segment of the left carpus is 1,96 mm. long, but 0,255 mm. thick in the middle, 

 being not yet 8-times as long as thick and presenting therefore a much stouter form than 

 in the specimen from Stat. 40. It is provisionally regarded as a variety. 



f 12. Alphetis Lutini Cout. 



H. COUTIERE, Alpheidae Maid, and Laccad. Archip. 1905, p. 885, PI. LXXVI, Fig. 24. 



Stat. 125. July 1819. Anchorage off Sawan, Siau-island. Reef. 7 specimens, 4 of which are 



egg-bearing. 

 Stat. 144. August 7/9. Anchorage north of Salomakiee-(Damar)-island. Reef. One young male. 



This species very closely resembles A. inicrostyhis (Sp. Bate), with which it was collected 

 at the same stations, but it is easily distinguished by the much shorter, rudimentary blade of 

 the scaphocerite. The specimens are of a smaller size than those of A. microstyhis, the largest, 

 a female with eess, beine iS mm. lona". Unfortunatelv Dr. Coutiere has not indicated the length. 



In this largest specimen the 2°<^ antennular article is almost twice as long (0,64 mm.) 

 as the visible part (0,34 mm.) of the i^' and 2,5-times as long as thick in the middle (0,255 iTim-)i 

 in other specimens it appears a little shorter or almost 3 -times as long as thick. Carpocerite 

 reaching to the middle of 3'^'i antennular article, scaphocerite almost as long as the antennular 

 peduncle. The scaphocerite, closely resembling Fig. 24 of Coutiere's paper, appears 2,5-times 

 as long as broad, but the terminal spine, 0,64 mm. long, appears as long as the blade, not 

 shorter; in all the specimens the blade is fringed with very short hairs along its whole length. 

 In all the specimens from Stat. 125 a minute rostrum is present, but it is wanting in the 

 specimen from Stat. 144, the anterior margin of the carapace looks as in Fig. 6 c of Plate CI 

 of the Challenger Report. In this specimen the scaphocerite is not shorter than the antennular 

 peduncle. 



214 



