126 MR. R. LYBEKKER OX [Feb. 21, 



4. Ttirsiops ferg'asoni Lydekker. 



Teeth ^^ and ^ = 50 and 51. 



Yertebi: C. 7, D. 13, L. 17, Ca. 24 = 61. 



Pterygoids divergent. 



5. Tursiops catalania (Gi-ay). 



Teeth U = 50. 



Yertebr^e: 0. 7, D. 12, L. 15, Ca. 24 = 58. 



Pterygoids divergent (?). 



6. Tarsiops parvimcmus Liitken. 



Teeth f^ = 49. 

 Yertebrfe = 62. 



7. Tursiops gilli Dall. 



Teeth z^^ and g = 44 and 45. 

 Yertebrfe (?). 



8. Tvrsiojys sp. (Trevandrum, 1903.) 



Teeth ^ and ?^ = 55 and 53, cr (in young) o- and ^ 



= 49 and 50. 

 Yertebrfe: 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. abuscdam 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 seiies, and the 

 addition of a caudal vertebra) to make the two identical in these 

 respects. On the other hand, T. ahusalmn is said to have the 

 pterygoids in contact, or, at all events, it is not stated to ditier in 

 this respect from T. tursio, but I do not attach much importance 



to this. 



The colouring of the type, and apparently only known, specimen 

 of T. abuscdam is given as follows in the original description :— 

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

 green. Margin of the upper lip, and entire under surface of the 

 body to the anus whitish fiesh-colour ; belly with small, irregularly 

 distributed, dark green spots. Iris dark green." 



With the exception that there appears to be no white margui 

 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 specimen 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 



