202 ZOOLOGISCHE MEDEDEELINGEN — DEEL III. 



Specimens in the Museum: 
1 6’, 1 9, Java, Kuhl & v. Hasselt coll. 
22 of, 14 9, Java (with label in de Haan’s handwriting ,,Sesarma 
fascicularis’’). 
1 6, north coast of Java, Buitendijk coll. 1905. 
3 6, 2 9, Batavia, Buitendiyjk coll. 1906. 
2 ', north coast of Java, Buitendijk coll. 1910. 
5 o’, 1 Q,: Celebes? 
1 o, 1 OQ, Macassar, Piller coll. 
1 Q, Philippines, v. d. Valk coll. 1897. 
Pl. XVI, Fig. 3. 
In discussing Ses. palawanensis Rathbun I have had oceasion to put 
forth the most important characters of the present species. The upper 
border of the mobile finger is provided with the well-known milled crest, 
which runs along the whole finger and ends near the tip of the finger, 
in both sexes. On close inspection the crest proves to be somewhat 
elevated above the level of the finger; it is flattened above, horny-coloured, 
and consists of a regular series of obliquely-transverse tubercles, straightly 
cut off, but having their anterior outer angle somewhat produced, and 
separated by narrow, deep grooves'). In this way a longitudinal, brown 
stripe is formed along the whole upper border of the finger. De Man 
counted 50—60 of these tubercles on each chela, Nobili about 40, and 
Birger 65 in the <7, somewhat less in the Q. I have examined 15 
specimens, taken at random (11 ©, 4 Q), and found in the © a number, 
varying from 46 to 62, in the 9 from 42 to 59, of such tubercles. 
Further characteristics are the longitudinal, pectinated crest, running 
at some distance from the upper border of the palm, and composed of 
obtuse, closely arranged teeth, such as are found in the subgenera Para- 
sesarma and Chiromantes. The inner surface of the palm is furnished 
with a transverse row of obtuse granules in the Q, but in the o’, even 
in halfgrown ones, this transverse row is elevated to a very conspicuous, 
prominent crest. 
That in some specimens the distance between the external orbital 
angles may exceed that between the epibranchial teeth, whereas in other 
cases the reverse is found, has been already noticed by de Man (1892). 
In examining the large series of specimens at my disposal, I detected 
a most curious character on the sternum of the present species. The 
4th sternite, between the bases of the anterior pair of 
1) It is improper to speak, as Alcock does, of ,,fine teeth”. 
