’s RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 241 
10 
11 
12 
13 
14 
Outer surface of palm of cheliped with a brush of longer 
hair. Carapace and legs covered with short hairs and tufts of longer 
hairs, as in Ses. lanata Alcock; sides of carapace nearly parallel, 
oh convergent posteriorly. Small species, distance between ex- 
ternal orbital angles 5 mm.; in the Red Sea. Ses. jousseaumei Nobili. 
Outer surface of palm of cheliped without a brush of hair. 11 
Sides of carapace very strongly divergent posteriorly. Walking 
legs very much elongated, penultimate pair of legs 3—4 times as 
long as distance between external orbital angles. 12 
Sides of carapace much less divergent posteriorly. Walking legs 
much shorter, at least less than 3 times the distance between external 
orbital angles. | | 13 
Penultimate pair of walking legs about 4 times as long as the 
distance between the external orbital angles; propodite about 5 times 
as long as broad. A longitudinal row of 8—10 acute tubercles along 
the middle of the external’ surface of the immobile finger. Two epi- 
branchial teeth on either side of the carapace behind external orbital 
angle; anterior margin of front rather deeply emarginate i in the middle. 
Middle-sized species, erates breadth of carapace about 18 mm. 
Ses. kraussi de Man. 
Penultimate pair of walking legs about 3 times as long as the 
distance between the external orbital angles; propodite about 3 times 
as long as broad. A longitudinal row of about 10 tubercles along the 
inferior border of the immobile finger. One single epibranchial tooth 
on either side of the carapace behind external orbital angle; anterior 
margin of front nearly straight. Middle-sized species, of the size of 
the preceding. Ses. longipes Krauss. 
Two epibranchial teeth behind external orbital angle on 
either side of the carapace, the posterior still very distinct, prominent 
and acute; carapace very convex in longitudinal direction, and covered 
with dark tufts of hair on the anterior parts, distinctly broader 
between external orbital angles than long. Upper margin 
of arm of cheliped armed with an acute, very strong tooth near the 
distal end; inner angle of wrist produced into a spine. Large species, 
distance between external orbital angles 35—40 mm. 14 
These characters not combined. 15 
_Mesogastrie region of carapace smooth. Anterior margin of front 
with a deep and narrow emargination. Ses. indica H. Milne-Edwards. 
