353 



1,34 mm - l° n ö> tne second segment only 1,1-times longer than the first; the chela, in which 

 the fingers are hardly shorter than the palm, appears as long as the 4 th and the 5 th segments 

 combined. Dana's description is not in accordance with his figure 8^: in this figure the sum 

 of the 3 rd , 4 th and 5 th segments appears, like in the specimen from Samoa, one and a half 

 as long as the 2 nd segment, while according to the description it should be just as long. The 

 chela in the Samoa specimen is not shorter than the 4 th and the 5 th segments taken together. 



Ischium of 3 ,d and 4 th legs with a movable spine. Merus of 3 rd legs 4-times as long as 

 wide in the middle, apical tooth rather small; the posterior margin of the carpus ends in a 

 spine, for the rest the carpus is unarmed ; propodus with 6 sets of spinules, dactylus simple, 

 almost half as long, viz. three-sevenths of the propodus. 



General distribution: Balabac Straits (Dana); Samoa (Ortmann) ; Japan, Kagoshima 

 (Ortmann). 



f 21. AlpJicus parvus de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI. 1909. p. 102. 



Stat. 133. July 25/27. Anchorage off Lirung, Salibabu-island. 36 m. Mud and hard sand. 1 

 female with eggs. 



A new species of small size, apparently belonging to the Crinitus subgroup and closely 

 related to A. crinitus Dana and A. clypeatus Cout. 



Rostrum acute, one and a half as long as broad at its base, projecting horizontally 

 forward and reaching to the distal fourth of the visible part of i st antennular article; the anterior 

 part of the rostral carina, from the tip to the middle of the eyes, is strongly compressed, 

 sharp, the posterior part that first somewhat broadens nearly to the base of the orbital hoods 

 and, narrowing then again, is continued to the posterior third of the carapace, appears obtuse. 

 The middle part of the interorbital carina is separated from the rounded, unarmed, orbital 

 hoods by narrow, though rather deep grooves, that anteriorly become broader, while they 

 slightly diverge posteriorly. Eyes large, broader than the interspace between them. Frontal 

 margin transverse, only very slightly sinuate at either side of the rostrum. 



Abdominal pleura broad, rounded or obtuse. Telson 4,54-times as long (1,68 mm.) as 

 its posterior margin is broad (0,37111111.), anteriorly twice as broad (0,8 mm.); posterior margin 

 hardly prominent, inner spines at the outer angles 0,35 mm. long, almost as long as the 

 posterior margin is broad, outer spines one-third of the inner. Spinules of the upper surface 

 0,15 — o, 16 mm. long, inserted not far from the lateral margins, the anterior pair immediately 

 in front of the middle, the posterior pair one and a half as far distant from the posterior 

 margin as from the anterior pair. 



Second joint of antennular peduncle twice as long as thick, one-fourth longer than 

 the visible part of the i st , 3 rd joint but a little shorter than the latter; terminal spine of stylo- 

 cerite hardly reaching to the end of i st joint. Basicerite with a small, inferior spine, 0,16 mm. 

 long, not extending as far forward as the stylocerite. Carpocerite projecting, like in A. clyfteatus, 

 beyond the antennular peduncle almost by the whole length of 3 rd article ; terminal spine of 



226 



