DELPHINID A!.—PONTOPORIA. 159 
Delphinus pseudodelphis. 
Schreb., Saugth. vii. pl. 358 (skull). 
STENO. 
Teeth :—23-23 to 25-25 — 99 to 100. 
23-23 to 25-25 
The Larer-rootaen Dotpoi. Steno frontatus. 
Gray, Zool. Erebus and Terror. tab. 43 (skull) ; Cat. Mamm. Brit. Mus. 
pt. i. Cetacea, pl. 7. fig. 4 (skull). 
a. Part of the upper jaw: teeth large. 
b. Bones of the ear. India. Presented by General Hardwicke. 
e. Skull. India. 
d, e. Skulls. 
f. Skull. From Mr. Argent’s Collection. 
The Comprussep-BEAKED Dotpumy. Steno compressus. 
Gray, Zool. Erebus and Terror, tab. 27 (skull). 
a. Skull. The specimen figured in the ‘ Voyage of the Erebus and 
Terror.’ 
b,c, e. Skulls. 
d, Skull. South Sea. Antarctic Expedition. Presented by the 
Lords of the Admiralty. 
The SHarp-sBeaKED Dotpuin. Steno attenuatus. 
Gray, Zool. Erebus and Terror, p. 43. tab. 28 (skull). 
a. Skull. India? Presented by Mrs. Ince. 
é. Skull. The specimen figured in the ‘ Voyage of the Erebus and 
Terror.’ 
c. Skull. 9° N. Lat. Presented by A. Pearson, Esq. 
Steno tucuxi. 
a, b. Skulls. Male and female. Amazon River. Collected by Mr. 
Bates.—The original specimens described by Dr. Gray. 
Steno hamatus. 
Delphinus hamatus, Schreb., Siugth. vii. pl. 869 (skull). 
PONTOPORIA. 
The Ponroporta. Pontoporia blainvillii. 
Gray, Zool. Erebus and Terror, tab, 29 (skull); Cat. Mamm. Brit. 
Mus. pt. i. Cetacea, pl. 7. fig. 4 (skull). 
Delphinus (Stenodelphis) blainvillii, Gervais et D'Orbigny, Voy. 
Amér. Mérid. Mamm. tab. 23 (skull). 
