290 
ZOOLOGY OF THE FAR EAST. 
inferred, as has been done by Bouvier, that they were altogether absent. In the 
comparatively short series of specimens before me the lower margin bears from i to 4 
very small teeth in its distal third ; it is therefore not improbable that it is occasionally 
toothless. 
Fig. 12. — Caridina serraia, Stimpson. 
a. Carapace, rostrum, etc. in lateral view. d. Third peraeopod. 
b. First peraeopod. e. Dactylus of same further enlarged. 
c. vSecond peraeopod. /. Fifth peraeopod. 
g. Dactylus of same further enlarged. 
The preorbital length of the antennular peduncle is only about half the postorbital 
length of the carapace. The lateral process of the basal peduncular segment is long, 
much as in C. serratirostris, de Man, reaching a little beyond the end of the segment to 
which it is attached. 
In lateral view the distal end of the second segment of the antennular peduncle is 
Dorsal teeth. 
I specimen has 5 teeth. 
1 .,8 
3 .specimens have 9 
2 ,, ,, lO 
5 .. II 
1 specimen has 12 
2 specimens have 13 
I specimen has 14 
Ventral eeth. 
2 specimens have i tooth. 
4 » ,,2 teeth. 
« ., ..3 „ 
3 >» i> 4 >> 
