tri 
Fig. 41, Udang pletök or udang tjetck (Alpheus spec.) Fig. 42. Udang pletók or udang tjéték (Alpheus spec.) 
from an empang near Gagah, Dorsal view. X 1. from an empang near Gagah. Ventral view. X 1. 
Fig. 43. Udang tanah (Thalassina spec.) from between the empangs near 
Luar Batang (cf. Map II). Seen from the left side. X 1. 
