1862.] OF CROCODILE FROM WEST AFRICA. 215 
which respectively represent the profiles of the head of C. vulgaris 
and C. leptorhynchus.) The disposition of the scuta or plates along 
the nose or muzzle is different in each species. Fig. 7 shows them 
in C. frontatus ; fig. 8, in C. vulgaris; and fig. 9, in C, leptorhyn- 
