130 ICONAXIUS CüNSOBRINUS. 



hiatus between them when closed. Fixed finger with one single, 

 subacute tooth of medium size that is curved towards the 

 tip, situated nearer to the articulation than to the tip and 

 preceded by a moderately deep notch ; prehensile edge 

 finely crenulate between that tooth and the tip; dactylus 

 with small, rounded tooth near the base. 



Palm of the smaller chela little shorter than the fingers, 

 without any trace of a tooth or prominence at the base of 

 the triangular fixed finger. 



Legs of the 2nd pair as in Icon, acutijrons., but the car- 

 pus is a little longer than the palm; in proportion to the 

 length of the merus and of the chela the carpus is, however, 

 shorter than in Icon. Weberi. 



Length 23,5mm.. 



4. Metapeneus elegans, n, sp. 



Station 121. Menado-anchorage. Depth 55 M. 



Closely resembling Metap. ajinis M.-Edw. (vide Alcock, 

 Indian Decapod Crust. Macrura, 1906, p. 21, PI. Ill, fig. 

 8, Sa — b), but the petasma has a different form, terminating 

 in two small anterior and two large posterior lobes, the 

 latter of which are obliquely furrowed on their posterior 

 surface. 



Rostrum slender, as long as antenuular peduncle, curved 

 upward, 1 -f- 10 toothed; upper flagellum barely shorter 

 than the peduncle. Carapace and abdomen smooth. Postros- 

 tral ridge low, obtuse, fading away before the posterior 

 margin of the carapace. Three first abdominal terga rounded, 

 telson without lateral spinules. 



First, second and third pair of legs with a small spine 

 at base, first pair also with a smaller spinule at the far 

 end of the ischium. Legs of the 5th pa^j. reaching to the 

 middle of antennal scales, shorter than those of Metap. 

 ajinis. Ischium of 5th legs with the lower margin expand- 

 ed, appearing as a sharp edge, without a subterminal 

 lobule; notch at the proximal end of the merus bounded 



Notes from the Leyden Museum, "Vol. XXIX. 



