152 
ZOOLOGISCHE MEDEDEELINGEN — DEEL 111. 


The chelipeds afford most characteristic features. They are large 
and bulky, of equal size, and apparently of a light colour in life. 
Superior border of arm with a rectangular tooth near the distal end, 
posterior border crenulate, with a sharp subdistal tooth, anterior border 
dentate, posterior half forming about 
a right angle with anterior half (Fig. 
4a). Carpopodite transversely rugose 
at the outer surface, inner angle 
produced. Palm much inflated, 
its height exceeding its horizontal 
length (Fig. 46); outer surface very 
minutely granulated; near the carpal 
joint and towards the upper margin 
the granules tend to form short rows, 
but im the middle of the outer sur- 
face they are irregularly distributed ; 
here a short obliquely longitudinal 
wrinkle is observed. The upper 
margin is sharply indicated 
by a row of horny-coloured 
granules, most of which are com- 
posed of two or even three granules, 
placed closely together. This charac- 
teristic row has been very well 
. observed by de Man (1880). Inner 
surface of the palm coarsely but 
sparingly granulated, the largest 
granules being found in the superior 
half, especially towards the upper 
margin, but there is no transverse 
row. The immobile finger is much 

Fig. 4. Sesarma eydouxi H. M. Edw. 
a Right cheliped, dorsal view. 
as aie flattened, excavated at inner surface 
b. Right chela, outer view. Magn. 2. mee © ech ae 
but provided at under margin (which 
is in a straight line with under margin of palm) with a row of sharp 
spines, directed forward and continued up to the tip. The movable finger 
is much curved, its back is provided with a longitudinal row of 12—13 
denticles, with mostly horny-coloured tips; besides, there are at the base 
some smaller dentic¢les, irregularly placed ; outer and inner surface smooth 
ayd shining, with numerous small pits; near the base, at the outer sur- 
face, is a small, rather well defined excavation. 
The meropodites of the walking legs are very much enlarged, being 
