No. It's Cro-Magnon phonemic script, which Postule, and other scholars of the time, always used for Neanderthal. Sorry, I should have put in between slashes to make this clear. The Cro-Magnons did not, of course use slashes (//); they used snardoovs (₪₪). Slashes were not invented until long after the Cro-Magnons had ceased publishing.