Black above and below, with white spot behind eye.
Inhab. Oregon, Aleutian Islands.
The following are the measurements of the different skulls of the genus in the collection of the British Museum; they were carefully taken with calipers by Mr. Edward Gerrard.
| O. stenorhyncha. | O. capensis. | O. latirostris. | O. pacifica. | O. intermedia. | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 361 b. | 361 c. | 1065 b, c. | 361 a. | 1065 a. | 362 a. | |||||||
| in. | lin. | in. | lin. | in. | lin. | in. | lin. | in. | lin. | in. | lin. | |
| Length from end of nasal to centre of occipital condyle | 35 | 0 | 37 | 0 | 39 | 0 | 33 | 0 | 36 | 6 | 14 | 0 |
| Length of nose | 17 | 6 | 18 | 6 | 22 | 6 | 17 | 0 | 18 | 0 | 7 | 0 |
| of tooth-line | 13 | 6 | 14 | 0 | 16 | 0 | 13 | 0 | 14 | 6 | 4 | 9 |
| of lower jaw | 27 | 6 | 30 | 0 | 31 | 0 | 26 | 0 | 29 | 6 | 11 | 3 |
| Breadth at the notch | 10 | 6 | 11 | 0 | 12 | 0 | 10 | 0 | 12 | 6 | 4 | 9 |
| at the orbit | 18 | 0 | 19 | 6 | 20 | 0 | 18 | 0 | 21 | 0 | 8 | 6 |
| at temple above | 18 | 0 | 19 | 6 | 20 | 0 | 18 | 0 | 20 | 0 | 9 | 0 |
| at middle of beak | 9 | 0 | 10 | 0 | 11 | 0 | 9 | 6 | 10 | 0 | 3 | 6 |
| at intermaxillaries | 3 | 3 | 3 | 3 | 4 | 6 | 3 | 3 | 3 | 6 | 0 | 9 |
2. OPHYSIA.
Ophysia, Gray, P. Z. S. 1870, p. 76; Synops. Whales & Dolph. p. 8.
Skull:—beak from the notch before the orbit the same length as from the notch to the condyle; width at the notch two-thirds the entire length of the beak. Intermaxillaries very narrow, slightly dilated in front; brain-cavity broad; occiput deeply concave. Lower jaw very broad on the sides, very thick and solid in front.
1. Ophysia pacifica.
B.M.
Ophysia pacifica, Gray, P. Z. S. 1870, p. 76.