734 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XVI. 



5. Turstops catalania (Gray). 



Teeth || = 50. 



Vertebrae : C. 7, D. 12, L. 15, Ca. 24 = 58. 



Pterygoids divergent (?). 



6. Tur stops paruimanus Liitken. 



Teeth \% = 49. 

 Vertebrae=62. 



7. Tursiops gilli Dall. 



Teeth ff and |£ = 44 and 45. 

 Vertebrae (?) 



8. Tursiops sp. (Trevandrum, 1903.) 



Teeth }£ and |f = 55 and 53, or (in young) §± and || = 49 and 50. 

 Vertebrae : C. 7, D. 12, L. 16. Ca. 23 = 58. 

 Pterygoids divergent. 



In this table No. 3 is the specimen figured in Plate XIII, Fig. 2, and No. 8- 

 the one shown in Plate XIII, Fig. 1. 



As regards the former, it will be seen that, both in respect of the dental and 

 the vertebral formula, it comes nearer to T. abusalam of the Red Sea than to 

 any of the others ; and indeed it would take very little (the loss of one tooth a- 

 side, which occurs in one instance, the transference of a dorsal vertebra to the 

 lumbar series, and the addition of a caudal vertebra) to make the two identical 

 in these respects. On the other hand, T. abusalam is said to have the ptery- 

 goids in contact, or, at all events, it is not stated to differ in this respect from 

 T. twsio, but I do not attach much importance to this. 



The colouring of the type, and apparently only known, specimen of T. abu~ 

 salam is given as follows in the original description : — 



" Upper surface of the head and body, the tail and fins, dark sea-green. Mar- 

 gin of the upper lip, and entire undersurface of the body to the anus whitish 

 flesh-colour ; belly with small, irregularly distributed, dark green spots. Iris 

 dark green." 



With the exception that there appears to be no white margin to the upper 

 lip in the Indian specimen, this description accords well with the general colour 

 of the former (especially when dried). On the other hand, the Indian spe- 

 cimen shows no spots on the belly (which may be a character of immaturity), 

 and the iris is described as brown instead of green. In point of size (that is to 

 say, in being smaller than T. tursio) the two agree sufficiently well : and in both 

 there is the same marked projection of the lower in front of the upper jaw. 

 The more pronounced elevation of the region of the below-hole in the type of 

 T. abusalam* may probably be explained by the greater age of the specimen. 



On the whole, I am inclined to regard the specimen under consideration as 

 being the immature form of T. abusalam, but it may be that the absence of 

 spotting on the belly is distinctive of the Indian form at all ages, although 

 I do not think this probable. 



* See True, Bull. U. B. Nat. Mus. No. 3(5, pi. ix, (lb8i».). 



