I 883. J PROF. FLOWER ON THE DELPHINID^. .507 



Deljj/iinus eutropia, Gray, P. Z. S. 1849, p. \,=^Eutropia dickiei. 

 Gray, Synoj)sis, p. 7 (18G8). 



These are all from the Southern Hemisphere. The last is quite 

 distinct from all the others. 



Orcella. 



Orcaella, Gray, Cat. Seals and Whales Brit. Mus. p. 285 (1866). 



Orcella, J. Anderson, P. Z. S. 1871, p. 142. 



Pterygoids widely separated from each other. Teeth J| to J^, small, 

 conical, pointed, rather closely set and occupying nearly the whole 

 length of the rostrum. VertehrEe 62 to 63. Manus of moderate size, 

 uot elongated, hut somewhat pointed. All the bones of the digits 

 broader than long, except tiie proximal i)halanges of the index and third 

 fingers. Dorsal fin rather small, placed behind the middle of the body. 



Two species, both of small size — -0. brevirostris, from the Bay of 

 Bengal, and O.Jluminalis, from the Irawaddy river, from 300 to 900 

 miles from the sea. Our knowledge of these is almost entirely due 

 to Dr. J. Anderson ('Anatomical and Physiological Researches, com- 

 prising an Account of the Zoological Results of two Expeditions to 

 ArVestern Yunnan in 1868 and 1875:' 1878). 



Orca, Gray, Zool. Erebus & Terror, p. 33 (1846). 



If) 



Teeth about y^, occupying nearly the whole length of the rostrum, 

 very large and stout, with conical recurved crowns, and large roots, 

 expanded laterally and flattened or rather hollowed on their anterior 

 and [losterior surfaces. Rostrum broad and flattened above, rounded 

 in front ; preniaxillse broad and rather concave in front of the nares, 

 contracted at the middle ol the rostrum, and expanded again towards 

 the apex. Pterygoids of noinial form, but not quite meeting in the 

 middle line. Vertebrse: C. 7, D. 11-12, L. 10, C. 23; total 51 or 

 52. Bodies of the first and second and sometimes the third cervical 

 vei tebrse united, the rest free. Pectoral fin very large, ovate, nearly 

 as broad as loiij^. All the phalanges and metacarpals broader than 

 long. Dorsal fin near the middle of the back, very high and pointed. 

 Anterior part of the head broad and depressed. 



All large, powerful, and rapacious animals (15 to 20 feet long) ; 

 they occur in almost all seas from Greenland to Tasmania. Many 

 species have been described (0. gladiator, duhameli, schlegeli, laf.t- 

 rosiris, minor, eschrichii, stenorhynclia, cajjensis, muyellaidcu, recti- 

 pinna, utra, destructor, pacijica, ike), but their specific diflereutial 

 characters, if any, have never been clearly defined. 



PsEUDORCA, Reinhardt, Oversigt Kong. Danske Vidensk. Selskabs 

 Forhandl. p. 151 (1862). 

 Teeth about ^^. Cranial and dental characters generally like 

 those of Orca, except that the roots of the teeth are cylindrical. 

 Vertebrae : C. 7, D. 10, L. 9, C. 24; total 50. First to sixth or 

 seventh cervical vertebrae united. Bodies of the lumbar vertebrae 



