1908.] Records of the Indian Museum. 223 



Henderson C^'A Contribution to Indian Carcinology," 1893, 

 p. 442) regards Pal. lamarrei as being merely the young of Pal. 

 carcinus (Fabr.), and by Ivanchester Pal. lamarrei is regarded as a 

 variety of Pal. carcinus ("Annals and Mag. Nat. History," ser. 7, 

 vol. vi^ 1900^ p. 263 and "^ Proc. Zool. vSoc." London, 1901^ 



P- 565)- 



The rostrum^ that exceeds the antennal scales in the largest 

 specimen by one-third, in the younger individuals b}' one-fourth of 

 its length, whereas in the youngest specimens it barely reaches 

 beyond them, is upturned distall^^ and presents, as regards its 

 toothing, a great variation. In 21 specimens from Port Canning 

 the following toothing was observed : — 



74-i-|-2 one speci- 5-I-1-J-1 one speci- 5+1-J-2 one speci- 



9 ' men. 8 ' men. 7 ' men. 

 6+1+1 7 + 2 



7+2 7+I+I 



7+I+I 7+1 



7 + 1 64-2 ,, 

 ^-5 — , ,, ,, — — , three specimens. 



o 2 



6+2 , . 6-hi 



— Q — , two specimens. — ■ — , one specimen. 



In 35 specimens from Calcutta the toothing was as follows : — 



8+2 . 7 + 1 . 6+2 three speci- 



— ■ — , one specimen. -~~ , one specimen. , ^ 



9 ' ^ 8 7 mens. 



8-|-i 7+^ two specimens, 6+1+1 one speci- 



9 ^ " '* 8 ^ in which the 7 ' men 



iip is broken. 



7+1 6-|-2 . 6+1 three speci- 



-^ — , 3> ,, -?r— , one specimen. , ^ 



g ' " " 8 ' 7 mens. 



9+2 6 -{-I 8-I-1+1 one speci- 



8 ' " '' 8 ' '' " 6 ' men. 



8 + 2 8+1 + 2 8+2 



8+1 7+1+? one speci- 8+J 



8^ " . " . 7.. ' men, in 6 ' . . '' '' 



: , : , which the tip ■ .. / ,: .. 



,,.;..;; ^s broken. .; . : : 



7+1 + 1 " 7+2 \. . 7+2 :j 



^-^-g , ,, „ ^—-, three specimens, —g-, „ „,_ 



7+2 ., . 7+1 7+1 



^-g—, three specimens. ^-—, ,, ,, — g-, ,, „ 



These numbers prove that there are proximally in most cases 

 7 or 6, more rarely 8 and exceptionally 9 or 5 upper teeth, that 



7 



5+2 



7 ' 

 5 + 1 



7 ' 



7 + 2 



6 ' 

 6+1 

 6 ' 



5 + 2 



