394 Records of the Indian Museum. [Vol XVI, IQ19.] 



I have seen no females of M. teschi ; four males yield the fol- 

 lowing measurements (in mm.) : — 



Length of Greatest breadth 

 carapace. of carapace. 



Port Canning . . . . 13*9 .... 227 



Arakan Coast . . . . 14" i .... 22*9 



Mergui .. ..|;4-9 •••• 227 



^ \ 14-2 .... 217 



It will be noticed that in the specimens from Mergui the 

 carapace is proportionately a little longer than in the others. 



The specimens examined are from the northern and eastern 

 sides of the Bay of Bengal. The geographical distribution of the 

 species appears therefore to be different to that of M . depressus 

 which extends from the Red Sea to the Gulf of Manaar. 

 o|.42 Pq^i Canning, Gangetic delta. 



^ii Arakan coast. 



il 1 3 fi 



Mergui. 



iVIacrophthalnius gastrodcs, Kemp, 



1915. Maci'ophtliaimiLi, gastfodes. Kemp, A/em. /nd. Alas., V. p. 228, pi. xii, 



%• 5. 

 This species, described contemporaneously with the publica- 

 tion of Tesch's monograph, differs widely from all other members 

 of the genus in the great proportionate length of the carapace and 

 its very strongly divergent lateral margins. It is known only from 

 two specimens obtained in water of variable salinity near the 

 mouth of the Chilka Lake in Orissa. 



