BACILLAR I A

(Lat.), n. f. sing. and n. pl. Ba*s(ba®k)-i?1-la(la8)"- ri?2.a%, Fr., bacillaire, bacillaires. 1. A genus of diatomaceous plants made by G. Gmelin, distinguished by the constant peculiar rhythmic motion of its frustules; so called from its rod-like shape. [B. 19, 261.) 2. As a n. n. pl. a group of unicellular organisms, variously regarded as of vegetable and animal origin, made by Ehrenberg, comprising the Diatom aceæ and the Desmid i neeæ of modern systems. [B, 261.]—B. paradoxica [Gmetin}. ‘A species with linear lanceolate valves, found in salt marshes in Europe. [B, 261.]—B. pectinal is [Metzsch.]. A species probably Identical with the Diatom a vulgare. [B, 173.]