398 



Only one specimen, 13,5 mm. long, without eggs, from Stat. 114 bears the large cheliped. 

 Merus 3-times as long as broad, upper margin unarmed at the apex, infero-external margin finely 

 and widely serrulate, infero-internal armed with 4 movable spinelets and ending in a small, 

 acute tooth. Chela slightly turned outward, 3-times as long as high and half as thick as high, 

 distinctly compressed ; the palm, twice as long as the fïngers, appears finely granular under a 

 lens, the granules are acute and a little larger on the inner than on the outer face. Upper 

 border of the palm obtuse without a trans verse groove near the dactylus, fringed, like 

 the lower border, with long hairs at the inner side, from the carpal articulation to the tip of 

 the fingers. In the ova-bearing female the merus of the larger cheliped appears comparatively 

 a little broader than that of the described specimen, which therefore is, no doubt, also a female. 



In all the specimens the small cheliped is missing. 



In an adult specimen from Stat. 114 the carpal segments of the second legs are 0,8 mm., 

 1,8 mm., 0,45 mm., 0,45 mm. and 0,56 mm. long; the chela is 1,25 mm. long (palm 0,5 mm., 

 fingers 0,75111111.). The carpus appears more slender than in A. rapacida: whereas the 

 second segment appears in this species 6-times as long as thick, it is in the adult specimen of 

 A. lepidus, probably a male, io-times as long as thick, the second segment being 0,19 mm. 

 thick in the middle. In the egg-bearing female from the same station, however, the carpal 

 segments are 0,72111111., 1,4111111., 0,4 mm., 0,4111111. and 0,5 mm. long; the chela is 1,14 mm. 

 long (palm 0,46 mm., fingers 0,68 mm.), but the second segment, also 0,19 mm. thick, appears 

 in the female comparatively a little thicker than in the male. In the female the second segment 

 is just twice as long as the first, in the male it appears a little longer and the chela is one 

 and a half as long as the first segment. 



Merus of third legs unarmed, more slender than that of A. rapacida, being 6-times 

 as long as broad ; propodus one-third longer than the unarmed carpus, resembling that of 

 A. rapacida as regards its form, armed with 3 short spines on the proximal half of its concave, 

 posterior margin and with a similar spine at the distal extremity. Dactylus two-thirds of the 

 propodus, resembling that of A. rapacida. 



In the female the propodus is one and a half as long as the carpus and the dactylus 

 measures three-fourths the length of the propodus. 



Merus of fourth legs measuring two-thirds that of the third. 



f45. Alphens Sibogac de Man. 



J. G. DE Man, in: Notes from the Leyden Museum, Vol. XXX, 1908, p. 107. 



Stat. 49 :v . April 14. 8°23'.5S., U9°4'.6E. Sapeh-Strait. 70 m. Coral and shells. 1 male. 



Stat. 51. April 19. Madura-bay and other localities in the southern part of Molo-strait. 

 54 — 90 m. Fine grey sand ; coarse sand with shells and stones. 5 specimens, 

 viz. 2 males, i egg-bearing female and 2 younger specimens. 



Stat. 305. February 8. Mid-channel in Solor-strait off Kampong Menanga. 113 m. Bottom 

 stony. I egg-bearing female. 



An interesting new species of the Brcvirostris group of small s i z e , the male being 

 12,5 mm. long, the egg-bearing female 13,5 mm. 



266 



