1905. J DOLPniXS FROM TRAVANCORE. 125 



the forehead, the inner enclosing a pale lajopet-shaped zone which 

 inclndes the narial apei'ture, and the outer becoming obsolete 

 halfway up. 



Eyes dai'k reddish brown. 



Lower jaw lighter than upper. 



Lips dull whitish. Fins falcate. 



Length of skull 16-3 inches; breadth 7-6 inches. Symphysis 

 much shorter than one-fourth total length of mandible. 



27 27 



Teeth ^ and -y^. = 54 and 53. Simple, conical, and pointed, 



more or less compressed towards the root ; antero-posterior dia- 

 meter 6*5 mm. Two teeth in the premaxillge, and the first two 

 mandibular ones, which were concealed in the gum, much smaller 

 (diameter 2 mm.). 



In spite of its being a somewhat immature specimen ajjparently 

 referable to the genus Tursiops, which it resembles in many 

 respects, the pterygoids are widely separated in the middle line, 

 with the posterior border divergent. 



Yertebrfe: 0. 7, D. 13, L. 15, Ca. 25 = 60. 



The atlas and axis only fused together. 



Ribs 13, the first four two-headed. 



Other characters as in T.fergiLsoni. 



From the general chai-acters of the specimei-i, the number and 

 size of the teeth, the vertebral formula, and the relative shortness 

 of the mandibular symphysis, I cannot but conclude that its 

 reference to Tursiops is correct. It is true that in the divergence 

 of the pterygoids it dififers from the typical T. tursio ; but 

 since the same feature occurs in the specimen identified with 

 T. catalania, this aflfords no grounds for generic separation. 



In the following table are given the dental and vei'tebral 

 formulae of the Dolphins assigned to the genus Tursiojis, inclusive 

 of the present specimens : — 



1. Tursiops tuo'sio (Fabricius). 



Teeth || = 44. 



Vertebra;: C. 7, D. 13, L. 17, Ca. 27 - 04. 

 Pterygoids in contact. 



2. Tursiops abusalmn (Riippell). 



Teeth :S = 52. 



Yertebrfe : C. 7, D. 12, L. 16, Ca. 2G ^ 01. 

 Pterj^goids (?) in contact. 



3. Tursiops sp. (Trevandrum, 1904.) 



Teeth ^ and ^g = 54 and 53. 



Yertebrse: 0. 7, D. 13, L. 15, Ca. 25 = 60. 

 Ptei-ygoids divergent. 



