80 



purplish Krev ; there are also two other bauds, paler in colour ; the 

 one branches from opposite the pectoral fin, and passes downwarda 

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

 Inhab : Pacific Ocean. 



*** Teeth about six in an inch. 

 Demhinus miceops\ Gray. The Small-headed Dolphin. 

 Synonyms — Deljohinus microps, Gray, S. & "W., p. 240. 

 Glymenia microps, Gray, Suppl., p. 69. 

 Teeth jsijg, six in an inch. 

 Described from skulls only. 

 Inhab : Coasts of Brazils. 



Delphis-tjs Styx, Gray. The Styx. 



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



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



Teeth iiris, slender, six in an inch. 



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

 slender. 



Inhab : "W. Africa. 



Delphinus Tethtos, Gervais. The Tethyos. 



Synonym — Delphinus Tethyos, Gray, S. & "W., p. 251. 



Teeth—? 



Inhab : North Sea — South Atlantic. 



Delphibts Alope, Gray. The Alope. 



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

 Glyrnenia Alope, Gray, Suppl., p. 70. 



Teeth 4555, 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 suificient 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 modem 

 Delphinus longirostris. 



* )iiKp6s, BmaU, and dii^, the face. 



