Note: They chiefly inhabit the northern countries and high mountains of Europe, Asia, and America. The common European species is Lagopus mutus. The Scotch grouse, red grouse, or moor fowl (L. Scoticus), is reddish brown, and does not turn white in winter. The white, or willow, ptarmigan (L. albus) is found in both Europe and America.
PTENOGLOSSA
Pte`no*glos"sa, n. pl. Etym: [NL., fr. Gr. (Zoöl.)
Defn: A division of gastropod mollusks having the teeth of the radula arranged in long transverse rows, somewhat like the barbs of a feather.
PTENOGLOSSATE
Pte`no*glos"sate, a. (Zoöl.)
Defn: Of or pertaining to the Ptenoglossa.
PTERANODON
Pte*ran"o*don, n. Etym: [Gr. (Paleon.)
Defn: A genus of American Cretaceous pterodactyls destitute of teeth. Several species are known, some of which had an expanse of wings of twenty feet or more.
PTERANODONTIA
Pte*ran`o*don"ti*a, n. pl. Etym: [NL.] (Paleon.)
Defn: A group of pterodactyls destitute of teeth, as in the genus
Pteranodon.
PTERICHTHYS
Pte*rich"thys, n. Etym: [NL., fr. Gr. (Paleon.)