582 DELPHINIDJE. 



two may be identical. Both are smaller than T. tursio and 

 have dark spots on the lower surface. The skull of T. catalaniais 

 16*75 inches long by 7'5 broad between the orbits, rostrum 9-75 

 long. Delphinus (Steno ?) maculiventer (p. 585) of Owen may be 

 Tursiops catalania. 



Genus STENO, Gray (1846). 



Head prolonged into a distinct narrow snout, which is separated 

 by a groove from the forehead. Dorsal and pectoral fins falcate. 



Eostrum of skull long, narrow and compressed. Symphysis of 

 mandible long, one fourth to one third the length of the ramus. 

 Teeth of moderate size, about one fifth (4-6 millim.) of an inch in 

 diameter ; 20 to 35 on each side of each jaw. Vertebrae of S. fron- 

 tatus: C. 7, D. 12, L. 15, C. 32=66. 



The species found on the coast of India are in part referred to 

 Solatia by Flower and True ; but the differences between the Indian 

 types here brought together appear to me scarcely to justify generic 

 distinction, until the skeletons are known. The typical Sotalice 

 are estuarine or fluviatile dolphins with 51 to 55 vertebra. 



Synopsis of Indian Species. 



A. Teeth very rugose, g to g S. frontatus, p. 582. 



B. Teeth nearly smooth. 



. Rostrum more than f length of skull ; 



teeth about g S. plumbeus, p. 683. 



b. Rostrum less than of skull. 



a'. Dark grey above ; teeth about |? . . . . S. perniger, p. 583. 



V. Speckled throughout ; teeth about || S. lentiginosus, p. 584. 

 c'. Black above ; teeth ^ S. ? maculiventer, p. 585. 



389. Steno frontatus. The rough-toothed Dolphin. 



Delphinus rostratus, Shaic, apud Cuv. Ann. Mus. xix, p. 10 (1812) ; 



Uesmarest, Nouv. Diet. H. N. ix, p. 160, nee Shaw. 

 Delphinus frontatus, Cuv. Oss. Foss. eU 2. v, pp. 278. 400, partim 



(1823). 



Delphinorhynchus rostratus, Blyth, J. A. S. B. xv, p. 368. 

 Steno rostratus, Blyth, J. A. S. . xxviii, p. 491 ; Flower, P. Z. S. 



1883, p. 483 ; True, Delphinidcs, pp. 24, 157, pi. vi, figs. 1, 2 ; 

 W. Selater, Cat. p. 324. 

 Steno frontatus, Blyth, Cat. p. 91. 



Snout long. Teeth to ||, distinctly rugose, the enamel closely 

 pitted with irregular very wavy furrows. Eostrum long and com- 

 pressed, its breadth in the middle varying from l to more than 



