perIsterIte

[Gr. peristera =a pigeon; suff. -ite ( Min.).] Min.: An iridescent, whitish variety of Albite (q. v.), the colors of which were supposed to resemble those of the neck of a pigeon. Found in Canada. per-I-ste-thus, s. [Pref. peri- , and Gr. stethos = the breast.] Ichthy.: A genus of Acanthopterygii, family Cataphract i. Head parallelopiped, upper surface and sides long; each præorbital prolonged into a flat proce , projecting beyond the snout. One contin uous dorsal, or two dorsals, of which the second is the more developed. Two free pectoral appendages; no teeth; barbels on lower jaws. Ten species are known; one, Per is teth us calaphractum, from the Mediterranean; eight from the Atlantic, and one from the Pacific.