134 | CETACEA. 
The following species have been named only from Aigures 01 
very slight descriptions :— Wer 
D. Senedetta, D. Commersonii, D. niger and D. '— ottii, 
'  Lacep. q 
D. Epidon and D. Mongitori, Rafinesque. 
15. PonNTOPORIA. 
Skull roundish ; beak very long, compressed, with a strong 
groove on each side above; eyebrow with a long, cylindrical 
crest ; lower jaw compressed, with a deep groove on each side ; 
symphysis very long. Teeth small, subcylindrical, smooth, 
rather hooked, acute. q 
Head with very long, slender beak. Dorsal fin high, faleate, 
central ; pectoral fins rather elongate, sublunate. | 
Pontoporia, Gray, Zool. Ereb. & Terror, 46, 1846. 
Delphinus, sp. Freminville. q 
Stenodelphis, Gervais, D’Orb. Voy. Amér. Mérid., not charac 
terized. 
1. Ponroporia BLAINVILLII. The PonroporiA. 
Skull, with the tubercles behind the blow-holes, broad, slightly 
convex ; eye-brows with a strong, longitudinal crest; upper and 
lower jaw with a deep, well-defined ridge on each side. Teeth $3, 
small, conical, hooked, smooth; symphysis more than half the e 
length of the lower jaw. 
Delphinus Blainvillui, Freminville, Mus. Paris. a 
D. Blainvillei, Gervais, Bull. Soc. Philom. 1844, 38; Institute 
1844. 
D. (Stenodelphis) Blainvillei, Gervais & D’ Orb. Voy. Amer. Merid. 
Mam. t. 23, skull; Reichb. Cetac. 128. 70. t. 24.f.78. 9” 
Pontoporia Blainyillin, Gray, Zool. E. & T. 46. t. 29, skull. 
Inhab. Monte Video. Skull, Mus. Paris. M. Freminville. 
M. Freminville described the Dolphin belonging to the skull! il 
as white, with a black dorsal band, and 4 feet long. 
in. lin. 
Lexicth. of skully- i. '.i05 056. 12.8 
Bs ie Angele 4 Shahan 8 0 
» of symphysis...... 6.9 
» Of teeth-line ...... 5o4 
M. D’Orbigny believes the dolphin he observed on the coas 
of Patagonia, of which the following is a description, is probabl 
the same as Stenodelphis Blainvillei; it is figured Voy. Amer. 
Meérid. t. 23. The skull of this animal was not examined 1 no) 
preserved. in 
