296 APPENDIX. 
Delphinus styx, Gray, has been referred with doubt to Scainnion's " Common Porpoise," and the 
North Pacific habitat thus indicated has been credited to D. styx by Gray in his last supple- 
mentary catalogue, but there are no good grounds for considering it a West American species, 
and the type is known to come from West Africa. 
Genus LeuCOrhamphuS, Lilljeborg. 
Leucorhamphus, Lilljeborg, Gill. 
Delphinapterus, Gray (not Lacepede), Zool. E. and T., 1846, p. 35; 1871, p. 72. 
Leucorhamphus Peronii. 
Delphinus Peronii, Lacepede, Cet., p. 517, 1804. 
D. leucorhamphus, Brooks, Cat. Mus., p. 39, 1828. 
Delphinaplerus Peronii, Gray (Lesson), 1866, p. 276; 1868, p. 6, pi. 15; 1871, p. 72. 
West coast of South America, latitude 50° south (Pickering). 
Black above, white below; the dividing line passing from the middle of the forehead below 
the eye, above the pectorals, and stopping at the flukes, which are black. Skull, 18.25 inches; 
beak, 10 inches. Teeth, ££, six in an inch. Skulls, Mus. Paris, and drawings of animal. 
Leucorhamphus borealis. PI. xix, fig. 3. 
Delphinapterus borealis, Peale, Zool. U. S. Ex. Exp., p. 38, 1848; Gray, 1866, p. 277. 
Delphinus borealis, Cassin, Mamm. TJ. S. Ex. Exp., p. 30, pi. vii, fig. 2. 
Right Whale Porpoise, of Scammon. 
West coast of North America. 
Form elongate ; black, with a lanceolate white spot beneath, extended in a narrow line nearly 
to the tail. Length, 4 to 6 feet. Teeth (?). Skull, Mus. S. I. Notes and measurements from 
life. 
A specimen of this species was obtained by me off Cape Mendocino, October, 1868. Careful 
notes, a sketch, and measurements were secured, together with the cranium, now in the National 
Museum. On comparison with Mr. Peale's original drawing, they agreed exactly, except that my 
specimen was considerably larger, measuring about six feet. Unfortunately, these notes are not 
now accessible. Cassin and Gray refer to it as being probably the young of a species of beluga ; 
but why tbey should do so, I can not imagine, as there are no grounds apparent for such a belief. 
It is unquestionably a dolphin. 
Genus Orca, Gray. 
Orca, Gray, Zool. E. and T., 1846, p. 33; 1866, p. 278. 
Ophysia, Gray, P. Z. S. 1870, p. 76 ; 1871, p. 93. 
Orca magellanica. 
O. magellanica, Burmeister, An. Mag. Nat. Hist., Ser. 3, xviii, p. 101, pi. 9, fig. 5; Annals 
Mus. Buenos Ayres, i, p. 373, pi. 22. 
Patagonia. 
Skeleton, Mus. Buenos Ayres. 
Orca destructor. 
O. destructor, Cope, Proc. Phil. Acad. 1866, p. 293. 
Payta, Peru. 
Teeth, |. Skull only, S. I. 
