CBTJSTACEA OF THE MEEGTJI AECHIPELAGO. 191 



is comparatively narrow, especially in the male, scarcely measuring 

 a third of the distance between the extraorbital teeth. 



Tlie third joint of the outer foot-jaws is longer than broad, 

 the proportion of its length to the breadth being as 5 : 3. In 

 tbe shape of the male abdomen, this species nearly agrees w th. 

 S. tceniolata or S. hidens (de Haan, I. c. pi. xvi. fig. 4). The 

 terminal joint is a little longer than broad at the base, the 

 penultimate about one half as long as broad at its base, and the 

 followiug joints appear successively larger and shorter. In the 

 largest female witbout eggs, and therefore probably not yet full- 

 grown, the terminal somite of the abdomen is only partially 

 pushed into the penultimate. 



The anterior legs are very similar to those of 8. Edwardsi, but 

 tbe hands are somewhat more elongate. Tbey are equal to one 

 another, as in 8. tceniolata and 8. Edwardsi. The ischiopo- 

 dites are armed anteriorly with a small acute tubercle near the 

 articulation with the arm. The anterior margin of the latter is 

 armed with some acute tubercles and with a somewhat larger 

 acute tooth a little before its distal end ; the upper margin is 

 transversely rugose, and the inferior margin is armed with some 

 acute tubercles. The outer surface of the arm is transversely 

 rugose, but the inner and the under surfaces are quite smooth, 

 the former being provided with the usual rows of hairs. The 

 upper surface of the wrist is covered with granules and with 

 minutely granulated oblique lines, and many small acute tuber- 

 cles are seen along the inner margin. The hands are about 

 twice as long as high, and the fingers are a little shorter than the 

 palm. The convex outer surface of the latter is everywhere 

 covered with small, more or less acute tubercles, which change 

 into minutely granulated, oblique, elevated lines towards the arti- 

 culation with the wrist. Similar granules are found also on the 

 upper surface of the palm, and the inner margin of its upper 

 surface is armed with some small acute tubercles, of which the 

 distal one, placed near the articulation of the thumb, is some- 

 what larger and dentiform. The convex inner surface of the 

 palm is granular, but never presents a granulated crest. There 

 is no gap between the fingers, which have a smooth, though some- 

 what punctate outer surface. The mobile finger is but little 

 arcuate, and its upper surface is armed with many small acute 

 tubercles or teeth, which are found also on the under surface of 

 the index ; the fingers, which are slightly excavated before their 



