80 



purplish grey ; there are also two other bands, paler in colour ; the 

 one branches from opposite the pectoral fin, and passes downwards 

 and forwards ; the other connects the eye with the pectoral fin. 

 Inhab : Pacific Ocean. 



*** Teeth about six in an inch. 



DELPHENTJS MICBOPS*, Gray. The Small-headed Dolphin. 

 Synonyms DelpUnus microps, Gray, S. & W., p. 240. 



Clymenia microps, Gray, Suppl., p. 69. 

 Teeth 35:^, six in an inch. 

 Described from skulls only. 

 Inhab : Coasts of Brazils. 



STYX, Gray. The Styx. 

 Synonyms Delphinus Styx, Gray, S. & "W., p. 250. 



Clymenia Styx, Gray, Suppl. S. & W., p. 70. 

 Teeth $&, slender, six in an inch. 



The skull very like to that of D. Euphrosyne, but the teeth more 

 slender. 



Inhab : "W. Africa. 



DELPHINTJS TETHTOS, Gervais. The Tethyos. 

 Synonym Delphinus Tetfiyos, Gray, S. & "W., p. 251. 

 Teeth? 

 Inhab : North Sea South Atlantic. 



DELPHIOTTS ALOPE, Gray. The Alope. 

 Synonyms 'Delphinus Alope, Gray, S. & W., p. 252, 399. 

 Clymenia, Alope, Gray, Suppl., p. 70. 



Teeth jffH, very slender, six in an inch. 



Inhab. : Cape Horn. 



The skull only known. 



The organic remains of several species, closely allied to this family 

 and the preceding one, have frequently been discovered in the strata 

 of the Meiocene period. Of these it is sufficient to notice that 



The Delphinus pseudodelphis, Gervais, is so similar in the form of 

 the skull and of the teeth to the Steno attenuatus that Dr. Gray 

 suggests they may be of the same species. 



The Delphinus dationum, Laurillard, and the D. vermontanus, Z. 

 Thompson, approach in structure to the common dolphin ; and 



The Delphinus Eenovi, Laurillard, greatly resembles the modern 

 Delphinus longirostris. 



, email, and &$, the face. 



