Crustacea Decapoda and Stomatopoda. 
^37 
in fresh water in the R. Yodo, above Osaka, where they run about on the piers of 
landing stages and on embankments at the edge of the river. 
In the neighbourhood of Shanghai Dr. Annandale found the species common, 
along with S. intermedia ; though found in fresh water it apparently does not pene- 
trate so far inland as the Tai Hu. The banks of all the small freshwater creeks at 
Shanghai and ponds in the same neighbourhood are full of its burrows and large num- 
bers of crabs may be seen in warm weather running on the mud. In winter they stay 
inside the burrows, only appearing in exceptionally warm sunny weather. None 
were seen in December at places where they were stated by residents to be common 
in summer, but young specimens were obtained by digging in embankments near the 
Whangpoo River ; probably the burrows of the adults were much deeper. 
Sesarma taeniolatum, White. 
1900. Sesarma taeniolatum, Alcock, Journ. Asiat. Soc. Bengal, LXIX, p. 419. 
Numerous specimens, the largest an ovigerous female with carapace 34I mm. in 
breadth between the outer orbital angles, were obtained by Dr. Annandale in the 
outer part of the Tale Sap. The ovigerous female was dug from a large and not very 
deep burrow at the edge of a small freshwater stream near the point where it entered 
the lake on Koh Yaw. Others were taken on fishing stakes and the piers of a land- 
ing stage above the water-line. 
It is probable that the female recorded from Singgora by Lanchester ^ under the 
name Sesarma lafondi, Jacq. and Lucas,'^ was in reality an example of this species. 
Sesarma siamense, Rathbun. 
1910. Sesarma (Chiromantes) siamense, Rathbun, Danske Vid. Selsk. Skrift. (7), natiirvid. og 
math., V, p. 328, text-figs. 11 a-c. 
Five specimens are in the collection, the largest a full-grown male with carapace 
10 2 mm. in length and 11-3 mm. in breadth at the outer orbital angles. The epibran- 
chial tooth is bluntly rounded in all the specimens and behind it rudimentary traces 
of a second tooth are usually visible. The large male has six sharp spinules on the 
upper edge of the dactylus ; in the females there are four, five or six. The striae on 
the upper surface of the palm bear a close resemblance to Miss Rathbun' s figure, but 
the very short distal stria that runs backwards from the dactylar articulation is only 
visible in one female. 
The specimens were found among the roots of dead palm trees at Kaw Deng near 
the mouth of the Tale Sap, on fishermen's stakes opposite Koh Yaw in the same neigh- 
bourhood and in the Patani River, south-east of the Tale Sap, in the Siamese Malay 
States. The water in the first two localities was brackish, its specific gravity varying 
from I 004 to I 0085 (corrected) ; in the Patani River it was quite fresh when the speci- 
mens were taken, though probably brackish under certain conditions of tide. 
I L,anchester, Proc. Zool. Soc. London, 1901, p. 550. 
■i Vide Tesch, Zool. Meded. Mus. Leiden, III, p. 164, pi. xv (1917). 
