ave 

’s RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. — 239 


Distance between external orbital angles distinetly less than 
the length of the carapace in the median line. 42 
bo 
Carapace and legs closely covered with a dense fur amid which 
are “freely scattered little dense, adherent tufts of hair resembling 
tubercles” (Alcock); on either side of the carapace two obtuse epi- 
branchial teeth, of the same shape and size as the external orbital 
angle; sides of carapace parallel. Upper border of palm of cheliped 
with a longitudinal crest. Meropodites of walking legs broad, though 
the breadth is less than half the length; apparently without subdistal 
tooth at the anterior margin. Small species, breadth of carapace about 
10 mm. Ses. lanata Alcock '). 
These characters not combined. 3 
3 Median postfrontal lobes narrower than outer ones; anterior 
margin of front nearly straight in the middle; sides of carapace pa- 
rallel. Upper border of movable finger of cheliped at base with 2—3 
smooth, oblique pliae, elsewhere smooth; upper border of palm with 
some oblique rows of ‘granules. Small species with a breadth of cara- 
pace of less than 10 mm. Ses. nannophyes de Man. 
These characters not combined. 4 
4 Upper border of palm provided with longitudinal pectinated crest, 
consisting of minute, horny-coloured teeth, placed close together. 5 
Upper margin of palm without such a pectinated crest, in some 
cases with a longitudinal row of granules. 6 
D Carapace flattened, subquadrate, with nearly parallel sides, and 
very small tufts of hair on the anterior part; second epibranchial 
tooth scarcely indicated. Pectinated crest at upper border of palm of 
cheliped consisting of about 35 teeth; upper border of movable finger 
with about 25 transverse tubercles, each of which is provided with a 
smooth stripe along the longitudinal axis of the tubercle. Walking 
legs rather long and slender, dactyli short. Middle-sized species, 
maximum breadth of carapace reaching to about 26 mm. 
Ses. brockii de Man. 
Carapace flattened, much more broad than long, with sides con- 

1) It is with some doubt, that this species is included here, for the whule appearance of 
the animal reminds one strongly of Clistocoeloma rather than of Sesarma. On the other hand 
it must not be forgotten that in the preceding subgenus Ses. vi//osa A. Milne-Edwards. that is 
a true Sesarma, bears a similar resemblance to Clistocoeloma. 
