264 ZOOLOGY OF THE FAR EAST. 
Palaemon elegans, de Man. 
1892. Palaemon (Eupalaetnon) elegans, de Man, in Weber's Zool. Ergebn. Reise Nieierldnd 
Ost.-Jnd., II, p 440, pi. xxvi, fig. 36. 
1903. Palaemon (Eupalaemon) elegans. de Man, Abhandl. Scnck. naturf. Ges., Frankfurt. XXV. 
p. 764. 
The specimens in the collection are from Patalung in Lower Si am. They 
agiee closely with the original description and also with an adult male from 
Buitenzorg determined by de Man and preserved in the Indian Museum : there are, 
however, slight differences in the form of the rostrum. 
In Javanese .specimens the upper edge of the rostrum is usually convex and 
at the apex is straight or directed a little downwards. In those from Patalung 
the upper edge is usually a trifle sinuous and the apex is straight, or (more 
particularly in young males and females) directed a little upwards. The teeth on the 
upper edge vary in number from q to 13,' with 2 or 3 situated on the carapace, thus 
agreeing exactly with de Man's account. On the lower edge, however, there are from 
4 to 6 teeth (usually 4 or 5) whereas in Javanese specimens there are only 2 or 3 and 
rarely 4- 
The spinules on the carapace of the male, except in the case of the largest speci- 
men, are restricted to the lateral walls and to the region in the vicinity of the 
hepatic spine. 
The identity of the Patalung specimens with P. elegans is proved beyond doubt 
by the form of the chelae of the adult male which agree in every particular with 
those of the specimen from Buitenzorg referred to above. The fingers are clothed 
with hair in their basal two- thirds, with teeth at their proximal end exactly as des- 
cribed by de Man, while the movable finger bears distally the characteristic double 
row of tubercles. Seven specimens yield the following measurements : — 
Sex. 
Total length. 
Length of cara- 
pace. 
Length of 2nd 
peraeopod. 
Second peraeopod 
S ' ■ 
3. "Si 
^ ^. 6 
: LENGTH OF 
i « 
^ i 
^ ->-> 
Cli Q 
61 
16-5 
8 
9-9 
167 
23-5 
t8-5 
X5-6 
TO-4 
14-0 
197 
134 
140 
57 
-! 
,54 
8-0 
ri-4 
137 
ro-8 
9-4 
J" 
58 
14-3 
65 
9'4 
13-0 
19-1 
i3"5 
Tr-6 
60 
14-2 
43 
7-1 
8-5 
IT7 
7"9 
77 
49 
I2'2 
377 
6-5 
77 
97 
7-3 
6-5 
9 ovig 
47 
II-3 
31-5 
54 
57 
8-8 
51 
4-3 
9 ovig. 
40 
97 
24-5 
47 
4-9 
6-6 
3-9 
3-5 
I Of twenty-three specimens two have 9 dorsal teeth, seven have 10, nine have 11, four have 12 and one has 13. 
* Of twenty-three specimens twelve have 4 ventral teeth, ten have 5 and one has 6. 
