NO. 3 (1922) GREY MULLETS OF TUTICORIN 89 



Proportions.— The total length of the body is 5 to 5% times 

 the length of the head. 



The head is usually 3V3 to 3H times the diameter of the eye 

 (3T2 and 376 were the extremes actually met with). 



The length of the snout is about V\ of the diameter of the eye. 

 Giinther makes the length of the snout and the diameter of the 

 eye equal, while Day states it to be " nearly one diameter." 



The least depth of the tail is equal to the postorbital part of 

 the head, and approximately half the length of the head, as stated 

 by Giinther. 



The length of the pectoral fin is as long as, or very slightly 

 longer than, the length of the head ; but Giinther says it is " some- 

 what shorter than the head." 



The height of the body is rather greater than the length of 

 the head, and approximately the same as the length of the caudal 

 fin. 



The postorbital part of the head is % of the total length of 

 the head, or occasionally slightly greater than %. 



The first spine of the first dorsal fin is a little longer than 

 the postorbital part of the head. 



The length of the third anal spine is approximately 2 / 5 of the 

 length of the head. 



Colour. — The distinctive colour features are a well-defined 

 black axillary spot at the base of the pectoral fin, and black tips to 

 the two dorsal and caudal fins. In spirit specimens, there is a fair 

 amount of reddish brown at the base of the anal, pelvic and 

 pectoral fins, as well as about the head. 



The body is laterally compressed, and in preserved specimens, 

 the myotomes of the body are usually clearly visible. Fairly large 

 specimens caught at Tuticorin measure from 16 cm. to 20 cm. for 

 the total length. 



Liza troschelli {Bleeker). 



D. 4 I 1/8 A. 3/9. L. 1. 32-34. L. tr. IO-II. 



The specimens described under this name possess much in 

 common with those described by previous writers as Mugil troschclii 

 and Mugil borneensis (Bleeker) ; presumably, Jordan and Seale (5) 

 had the same difficulty and regarded the two species as synony- 

 mous. Much of the difficulty arises from the absence of exactly 



