38 



i6 mm. and proved to be a male, the endopodite of the 2 nd pleopod being provided with a 

 stylamblys and an appendix masculina. 



The nearest related species is no doubt A. temiicarpus de Man from the north coast 

 of Celebes and the east coast of Sumbawa. The acute rostrum which is as long- as broad at 

 base, extends horizontally forward about to the middle of the visible part of basal antennular 

 article and is separated by very shallow concavities from the rounded orbital hoods. The 

 rostral carina that extends only to the base of the orbital hoods, appears on its anterior 

 half rather sharp, but posteriorly obtuse ; it is rat her low, quite concealed in a lateral view 

 by the orbital hoods and appears in the middle slightly concave; separated by deep grooves 

 from the orbital hoods, it is narrow on the anterior half but from the middle gradually widens 

 a little before passing into the surface of the carapace, which is smooth like that of the 

 abdomen. Of the male the telson is lost, the measurements of the telson of the female (Fig. i 6) 

 and of the male from Stat. 5 1 are indicated in the Table : it closely resembles that of A. temii- 

 carpus, but the dorso-lateral spinules that are 0,26 mm. long, are a little farther distan t 

 from the lateral margins. The tvvo pairs of antennae agree with the figure 85 (1. c.) of the 

 male from Stat. 51, but in both specimens from Ambon the antennal peduncle is as 

 long as that of the inner antennae and in the male the antennal scale appears a little 

 longer than the antennular peduncle. 



Unfortunately the male from Ambon has lost both peraeopods of the i st pair and the female 

 the larger cheliped. The merus of the small cheliped (Fig. 160) of the female, placed on the left 

 side, is 5-times as long as broad in the middle, being 3,5 mm. long and 0,7 mm. broad; the 

 distal extremity of the upper margin is unarmed, the infero-external margin finely serrulate by 

 about 25 serrulations, while the infero-internal is armed with a small acute tooth at the distal 

 end and with 5 aciculiform, movable spinelets that increase in length from the i st , implanted 

 at the proximal fourth, to the 5 th placed a little bevond the middle. Between the 5 th spinelet 

 and the distal tooth the margin bears 4 or 5 long hairs and a few are implanted on the lower 

 surface. The short carpus, 1,1 mm. long and 0,7 mm. thick distally, measures one-third of the 

 merus and is one and a half as long as thick. Chela 5,8 mm. long, the palm which is 2,6 mm. 

 long and 3,25-times as long as wide, is a little shorter than the fingers, the proportion 

 between their length being like 13:16. 



The carpal segments of the right 2 nd leg of the male (the left is lost) are 1,25 mm., 

 1,48 mm., 0,54 mm., 0,54 mm. and 0,62 mm. long, the 2 nd segment, 0,2 mm. thick, is 7,4- 

 times as long as thick; chela 1,02 mm. long, palm 0,44 mm., fingers 0,58 mm. In the female 

 the carpal segments of the right leg are 1,1 mm., 1,3 mm., 0,48 mm., 0,48 mm. and 0,54 mm. 

 long, the 2 nd segment 6,9-times as long as thick; chela 1 mm. long, palm 0,44 mm., fingers 

 0,56 mm.; for the left leg these numbers are 1,1 mm., 1,28 mm., 0,48 mm., 0,48 mm. and 

 0,52 mm., the 2 nd segment 6,4-times as long as thick, chela 1 mm. long, palm 0,44 mm., 

 fingers 0,56 mm. 



The male bears still the peraeopods of the 3 rd pair. The merus, 4 mm. long and 

 0,52 mm. broad, is 7,7-times as long as broad, the carpus, 1,8 mm. long and distally 0,45 mm. 

 thick, is 4-times as long as thick ; the propodus, that slightly narrows from the proximal to 



