. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. A recent examination of a small collection of about twenty- five skulls collected on San Nicolas Island and representing those Shoshoneans which became extinct there alxnit a century ago, re- veals an appalling incidence of deafness due to the presence of one or more, small or large aural ostcomata in the outer one- third of the auditorv meatus (See Plates 23 and 24). The exact. PLATE 23 The aural exostosis or osteoma of the right ear almost closes the meatus, recognized by the black crescent,
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. A recent examination of a small collection of about twenty- five skulls collected on San Nicolas Island and representing those Shoshoneans which became extinct there alxnit a century ago, re- veals an appalling incidence of deafness due to the presence of one or more, small or large aural ostcomata in the outer one- third of the auditorv meatus (See Plates 23 and 24). The exact. PLATE 23 The aural exostosis or osteoma of the right ear almost closes the meatus, recognized by the black crescent, at the point of the arrow. When the skin, thickened by the ceruminous g-lands, was present, the passage was com- pletely blocked. The passage is closed in its middle one-third by hyper- plastic bone, anyway, and the Indian was stone deaf, in both ears, and had been so for some years before death. He had suffered from a chronic, progressive deafness for most of his life, and these pictures show the almost complete closure of the passage. Ma,s.—Right mastoid: Md.—Ramus of right mandible. No. 830, Lcs Angeles Museum. 47. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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