’s RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 237 


a = 

bercles on the proximal half, each of which with a narrow, smooth 
stripe in its longer axis; distal half of mobile finger with 3—4 longer, 
less prominent tubercles and numerous transverse, somewhat convex 
ridges. Ses. eulimene de Man. 
Sides of carapace divergent posteriorly; surface with nume- 
rous tufts of hairs, looking like small tubercles. Crest on upper 
margin of palm consisting of 25—30 minute, horny-coloured teeth; 
mobile finger with 15—16 smooth, transverse tubercles, each of which 
has a shallow and narrow groove in its longer axis. Meropodites of 
walking legs at the anterior margin with a little prominent, rectan- 
gular, subdistal tooth. Ses. villosa A. Mille-Edwards. 
7 Length of carapace less than distance between external orbital 
angles; sides not divergent posteriorly. 8 
Length of carapace more than distance between external orbital 
angles; sides divergent posteriorly. Mobile finger of cheliped with a 
milled crest consisting of about 40 teeth. Meropodites of walking legs 
much foliaceous, less than twice as long as broad; dactyli short, less 
than half the length of the very robust propodites. 
Ses. latifemur Alcock '). 
8 Sides. of carapace nearly parallel, only slightly converging poste- 
riorly. Mobile finger of cheliped with 8—9 scalariform tubercles in 
o', 5—6 in Q. Meropodites of walking legs more than twice as long 
as broad, with acuminate spine near the distal end of the anterior 
margin; propodites slender, more than 4 time’ as long as broad; dactyli 
short, not half the length of the preceding joint. Ses. limbensis Rathbun. 
Sides of carapace distinctly converging posteriorly, immediately 
behind the external orbital angles. Mobile finger of cheliped at upper 
border with 15—20 smooth, transverse ridges. Meropodites of walking 
legs foliaceous, less than twice as long as broad, with rectangular, 
not acuminate, spine near the distal end of the anterior margin ; 
propodites broad, about 2'/, times as long as broad; dactyli rather 
long, slightly shorter than the preceding joint. Ses. stormé de Man. 
1) As Alcock himself admits, his species bears a very striking resemblance to Ses, elongata 
A. Milne-Edwards and it is not improbable, that these species are identical, but in Ses. datifemur 
no mention is made of the pectinated crest near the upper border of the palm of the cheliped 
(though something of this kind is indicated in Alcock’s figure) and the sides of the carapace are 
decidedly divergent posteriorly” (Alcock), not ,nearly parallel” (de Man, 1892, in his description 
of the type-specimen of Ses. elongata). Moreover the former species has a comparatively much 
longer and narrower carapace. 
