218 ZOOLOGISCHE MEDEDEELINGEN — DEEL III. 
broad but not very deep emargination in the middle; in this respect, and 
also by the width of the front being nearly equal to half the distance 
between the external orbital angles, the species resembles Sarm. birdi; 
the lateral parts of the anterior margin of the front, if viewed from 
above, are sloping obliquely backward towards the distinetly pointed 
angles; the side margins of the front are much concave. The median 
postfrontal lobes are 1'/, times as broad at the outer ones (like Sarm. 
punctatum); the groove between the inner lobes is very broad, but not 
deep, and the median triangular portion of the mesogastric region projects 
far forward; inner and outer lobes are separated by narrow furrows, and 
the latter lobes are defined laterally along some distance by concave 
grooves, marking off the protogastric regions. The mesogastric area is 
well-defined, especially at the four angles, by deep grooves; the cardiac 
region is somewhat less distinctly separated off from the branchial areas, 
and the former is divided by a transverse furrow into an anterior and a 
posterior part. | 
The whole surface of the carapace is smooth and glossy, but every- 
where crowded with minute pits, that, in life, apparently mark the in- 
sertion of numerous tufts of hairs; such tufts are largest on the hepatic 
and the posterior part of the protogastric regions, extending also on 
towards the postfrontal lobes; on the branchial regions the hairs are 
arranged in oblique, parallel rows. | 
The abdomen of the {/ (Fig. 7) is narrow; the posterior margin of 
the penultimate segment is 1'/, times the length of 
the segment; the last segment is longer than broad 
at the base. 
Chelipeds generally equal in size in both sexes, 
but in the © from Obi the right is somewhat larger 
than the left. Upper border of arm, like the outer 
surface, transversely rugose, more so in the © than 
in the 9, but there is no tooth near the distal end; 
outer border regularly and coarsely denticulate; inner _ 
border with some few teeth in the middle third, but 
Sen otherwise entirely smooth, somewhat expanded in its 
n. sp. Abdomen.  distal half. Wrist with wavy rows of minute granules 
ME above, denticulate at the inner part of the anterior 
margin, but inner angle not produced; under surface with transverse row 
of about 10 granules. Palm (Fig. 8) shorter than fingers; horizontal length 
equal to height; outer surface convex, in the © covered with numerous 
rugosities and pits of different size, an obliquely-horizontal wrinkle in the 
middle ; towards the upper border about 8—9 short transverse rows of very 
