ROSS’ SEAL. 41 
Such skulls of the Northern Orca as I have been able to examine present an array 
of teeth which weil agree with their inscriptions. The distance dividing the conical 
crowns varies from 1 to 24 inches. These measurements as nearly as possible agree with 
many of the scars. Take, for example, such scars as are figured below from skin No. 6 
in our collection, showing not only where the teeth of the upper and lower jaws 
pierced the skin, but where the skin eventually gave way and allowed the victim to 
escape (fig. 26, p. 38). The spacing of the teeth in this case must have been about 
an inch, and the length of jaw which inflicted the wounds, about 21 inches. 
OMMATOPHOCA ROSSI. 
Ross’ Seal. 
Ommatophoca rossi, Gray, Zool. Ereb. and Terr. (1844), pp. 7-8, Pls. VII., VITI.; Barrett Hamilton, Rep. 
‘South. Cross’ Coll. (1902), p. 46, ibigue citata ; Brown, Mossman, and Pirie, Voy. ‘ Scotia’ (1902), 
pp. 320, 321, 327, 350, 361. 
List oF MatTeERIAL IN ‘Discovery’ CoLLECTION. 
No. 1, 6, ad. skin and skull. Jan. 7, 1902. 68°S. lat., 175° E. long. Pack ice, Ross Sea. 
No. 46, ¢, ad. skin and skull. Jan. 8,1902. 70°S. lat.,173° E. long. Pack ice, Ross Sea. 
No. 14, ?, ad. skin and skull. Jan. 6,1902. 68°S. lat., 175° E. long. Pack ice, Ross Sea. 
(Mounted for the B. M. Gallery by Rowland Ward.) 
List or Materiat In ‘ Morning’ CoLLEcrion. 
No. 68, M. 26, ¢, ad. skin and skull. Jan. 1903. 69°8., 178° E. Pack ice, Ross Sea. 
No. 67, M. 25, ¢, ad. skin and skull. Jan. 1903. 69°58., 178° E. Pack ice, Ross Sea. 
No. 69, M. 28, ¢, ad. skin and skull. Jan. 1903. 69°8.,178°E. Pack ice, Ross Sea. In 
full moult. 
Ommatophoca was first discovered by the British Expedition of 1840 under Sir 
James Ross, and the type specimen which was captured on January 8th in the pack 
ice to the north of Ross Sea (68° lat., 176° E. long.), is now in the British Museum 
(No. 324 A). It was described by Dr. J. E. Gray, and remained unique until, first 
the Belgian Expedition of 1898-99, and then the ‘Southern Cross’ of 1898-1900, 
brought home more examples and some notes upon its natural history. 
Mr. Bruce’s “ Mottled Grey Seals” were almost certainly young adult Crab-eaters 
in the freshly moulted coat. The two species are not easily confounded, and so far 
Ross’ Seal has never been discovered in numbers together, preferring, it would seem, 
always to live a solitary existence in the pack. 
From Dr. Racovitza we have a description of this seal, of its voice in particular, 
and of its general appearance in the flesh, accompanied by a very excellent photograph 
which shows the peculiar habit it has of inflating the pharynx with air. 
Six specimens of Ommatophoca were procured by our own expedition in the 
pack ice of Ross Sea, and on thirteen occasions it was seen by members of the 
‘Belgica’ Expedition in the pack ice to the west of Graham’s Land. This very 
