Repand: Like the border of an open umbrella (Fig. 148, c). Erose: As if gnawed, irregularly toothed (Fig. 148, d). [Illustration: FIG. 148.--Edges of colonies: a, Entire; b, undulate; c, repand; d, erose.] Lobate. Lobulate: Minutely lobate (Fig. 149, e). Auriculate: With ear-like lobes (Fig. 149, f). Lacerate: Irregularly cleft, as if torn (Fig. 149, g). Fimbriate: Fringed (Fig. 149, h). Ciliate: Hair-like extensions, radiately placed (Fig. 149, j). Tufted. Filamentous: As already defined. Curled: As already defined. [Illustration: FIG. 149.--Edges of colonies: e, Lobar-lobulate; f, auriculate; g, lacerate; h, fimbriate; i, ciliate.] (F) ~Optical Characters~ (after Shuttleworth).-- 1. _General Characters_: Transparent: Transmitting light. Vitreous: Transparent and colourless. Oleaginous: Transparent and yellow; olive to linseed-oil coloured. Resinous: Transparent and brown, varnish or resin-coloured. Translucent: Faintly transparent. Porcelaneous: Translucent and white. Opalescent: Translucent; greyish-white by reflected light. Nacreous: Translucent, greyish-white, with pearly lustre. Sebaceous: Translucent, yellowish or greyish-white. Butyrous: Translucent and yellow. Ceraceous: Translucent and wax-coloured. Opaque. Cretaceous: Opaque and white, chalky. Dull: Without lustre. Glistening: Shining. Fluorescent. Iridescent. 2. _Chromogenicity_: Colour of pigment. Pigment restricted to colonies. Pigment restricted to medium surrounding colonies. Pigment present in colonies and in medium. ~Streak or Smear Cultures.~-- _Gelatine and Agar._--Note general points as indicated under plate cultivations. _Inspissated Blood-serum._--Note the presence or absence of liquefaction of the medium. (The presence of condensation water at the bottom of the tube must not be confounded with liquefaction of the medium.) _All Oblique Tube Cultures._-- 1. Colonies Discrete: Size, shape, etc., as for plate cultivations (_vide_ page 261). 2. Colonies Confluent: Surface elevation and character of edge, as for plate cultivations (_vide_ page 263). Chromogenicity: As for plate cultures. ~Gelatine Stab Cultures.~-- (A) _Surface Growth._--As for individual colonies in plate cultures (_vide_ page 261). [Illustration: FIG. 150.--Stab cultivations--types of growth: a, Filiform; b, beaded; c, echinate; d, villous; e, arborescent.] (B) _Line of Puncture._-- Filiform: Uniform growth, without special characters (Fig. 150, a). Nodose: Consisting of closely aggregated colonies. Beaded: Consisting of loosely placed or disjointed colonies (Fig. 150, b). Papillate: Beset with papillate extensions. Echinate: Beset with acicular extensions (Fig. 150, c). Villous: Beset with short, undivided, hair-like extensions (Fig. 150, d). Plumose: A delicate feathery growth. [Illustration: FIG. 151.--Stab cultivations--types of growth: f, Crateriform; g, saccate; h, infundibuliform; j, napiform; k, fusiform; l, stratiform.]