No. 3 (1922) GREY MULLETS OF TUTICORIN 91 



Lateral line series. — The number of scales in the lateral line is 



32 to 34- 



Lateral transverse series. — 10 or II rows of scales are present 

 on the side of the body; there may be TO on one side and II 

 on the other of the same specimen. 



Origin of the dorsal fins. — The first dorsal fin originates above 

 the 10th or nth scale of the lateral line, while the second dorsal 

 fin arises above the 21st to 23rd scale. 



Position of the anal fin. — About half of the base of the anal fin 

 is in advance of the origin of the second dorsal fin. 



Proportions. — The total length of the body is 4% to a fraction 

 over 5 times the length of the head. 



The length of the head is 3% to 4 times the diameter of the eye. 



The length of the snout is V\ to 4 5 of the diameter of the eye. 



There is little difference between the lengths of the head and 

 the caudal fin and the height of the body, though the head measure- 

 ment is usually slightly the greater. 



The least depth of the tail is a little less than V 2 the length of 

 the head, and less than the length of the postorbital part of the head. 



The length of the pectoral fin is a little less than the length of 

 the head, not including the snout. 



The length of the first spine of the first dorsal fin is usually a 

 little greater than the length of the postorbital part of the head; 

 occasionally it is of the same length. 



The third anal spine is less than Yj, the length of the head. 

 Colour. — No striking colour is to be noted ; in some specimens 

 the upper extremity of the second dorsal fin is dark. 



This fish is fairly large and frequently exceeds 25 cm. in 

 length. 



LIZA AMARULA (Cuv. & Vol. and Day). 



D. 4 I 1/8. A. 3/9. L. 1. 36. L. tr. 12. 



I have not found it possible to give characters suitable for the 

 immediate recognition of this species, which is easily confused with 

 L. trosehelii ; the anal fin is in advance of the second dorsal by one- 

 third of its base, but this can scarcely be useful for ready identifi- 

 cation. It is only when details are considered that the distinction 

 is established. However, this species is not a very common one at 

 Tuticorin, and I have only met with three or four specimens, the 

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