.)/ 



5 



At eithcr side of the articulation the palm ends in an obtuse tooth, the tooth at the end of 

 the upper (outer) border being larger than the other; immobjle finger shorter than the dactylus 

 and longitudinally grooved on its outer (lower) face. On the outer (lower) surface 

 of the palm a few short hairs are inserted, but the inner (upper) is more hairy, especially on 

 its upper (outer) portion and on the immobile finger. Lower (inner) border of the chela 

 rounded, entire. 



Merus of the small cheliped less broad in proportion to its length than that of the larger, 

 upper margin terminating in an acute tooth, infero-internal unarmecl. Chela half as long as the 

 larger, also turned ontward; fingers conical, shutting together, as long or hardly shorter than 

 the palm, the margins of which are parallel, entire; inner (upper) surface of palm and 

 fingers hairy. 



Carpal segments of the second legs i mm., 1,1 mm., 0,32 mm., 0,36 mm. and 0,54 mm. 

 long; chela 1,06 mm. (palm 0,46 mm., fingers 0,6 mm.). The carpus much resembles that of 

 A. bidens, but the chela is twice as long as the 5 th segment, in A. bidcns only one and a half. 



Ischium of 3 rd and 4"' legs with a strong, movable spine. These legs are of a stouter 

 shape than those of A. bidens. So e. g. the meri of 3 rd legs are 2,4 mm. long and 0,6 mm. 

 broad in the middle, 4-times as long as broad. As well in the 3 ld as in the 4 th legs the 

 meri are armed with a strong, acute, apical tooth ; posterior margin of the carpus with t w o 

 acute teeth at the distal extremity, as in A. bidcns, anterior margin with a few long setae. 

 Propodus of 3 rd legs straight, slightly narrowing, one-third longer than the carpus and 4,5-times 

 as long as wide, appearing also of a less slender form than in A. bidens \ posterior margin 

 with 7 strong spines and with another row of shorter spines near them, there is also a spine 

 at the far end of the setose, anterior margin. Dactylus of 3 rd legs measuring two-fifths of the 

 propodus, 5-times as long as thick at base, slightly curved, simple. 



f30. Alphens bicostaitts de Man. 



J. G. de Man, in: Notes from the Leyden Museum, Vol. XXX, 1908, p. 102. 



Stat. 37. March 3031. Sailus ketjil, Paternoster-islands. Close to reef. 27111. and less. Coral 



and coralsand. 1 male and 4 egg-bearing females. 

 Stat. 99. June 28/29/30. 6°7'.5N., I20°2Ó'E. Anchorage off North-Ubian. 16 — 23 m. Litho- 



thamnion. 1 adult egg-bearing female and 7 young specimens, 6 of which were 



collected at the surface. 

 Stat. 205. September 20. Buton-strait, between floating seaweed. 1 adult male and 1 ova- 



bearing female. 



A new species of the Insignis subgroup of Coutière, closely related to A. bidens 

 (Oliv.), A. cristatus Cout. and A. praedator de Man. 



The rostrum, acute and narrow, reaches to the distal fourth or fifth of the visible part 

 of i st antennular article or extends to the end of this article, sometimes even just beyond it, as 

 in the egg-bearing female from 'Stat. 37. Rostral carina subacute, sometimes rather obtuse and 

 less prominent than the orbits, so that in a lateral view of the carapace the carina is partly 

 concealed by the orbital hoods. The rostral carina usually extends backward as far as a small 



243 



