GENERAL BACTERIOLOGY 



85 



network, like the vein of a leaf (Fig. 22, 7) ; filamentous, floccose, or 

 curled, as defined under 1 above. 



FIG. 22. Microscopic Structure of Colonies. A, Colony as a whole. B, Edge of Colony. 

 1, Areolate; 2, Grumose; 3, Moruloid; 4, Clouded; 5, Gyrose; 6, Marmorated; 7, Recticu- 

 Jate; 8, Repand; 9. Lobate; 10, Erose; 11, Auriculate; 12, Lacerate; 13. Fimbricate; 14, 

 Ciliate. 



B. Edge of colonies: entire, without toothing or division; 

 undulate, wavy; repand, like the border of an open umbrella (Fig. 

 22, 8) ; lobate, (Fig. 22, 9) ; erose, as if gnawed, irregularly toothed 

 (Fig. 22, 10) ; auriculate, with ear-like lobes (Fig. 22, 11) ; lacerate, 

 irregularly cleft, as if torn (Fig. 22, 12) ; -/imbricate, fringed (Fig. 

 22, 13) ; ciliate, hair-like extensions, radially placed (Fig. 22, 14) ; 

 filamentous, (Fig. 20, G) ; curled, (Fig. 20, E). 



6. Color (to be determined for both transmitted and reflected 

 light) : transparent; vitreous, transparent and colorless; oleaginous, 

 transparent and yellow, olive to linseed oil colored ; resinous, trans- 

 parent and brown, varnish or resin colored : translucent; paraffinous, 

 translucent and white, porcelanous ; opalescent, translucent, grayish- 

 white by reflected light, smoky-brown by transmitted light ; nacreous, 

 translucent, grayish- white with pearly lustre; sebaceous, translu- 

 cent, yellowish or grayish white, tallowy ; butyrous, translucent and 

 yellow; ceraceous, translucent and wax colored; opaque; cretaceous, 

 opaque and white; chalky, dull without lustre; glossy, shining; 

 fluorescent; iridescent. 



7. Consistency: hard, friable; soft; viscid. 



8. Changes in medium: Liquefaction (gelatin), shape of liqui- 

 fied area, character of the fluid, membrane and sediment see under 

 Bouillon below ; color; odor; consistency. 



II. Deep Colonies. 



1. Form. 2. Size. 3. Character of surface. 4. Microscopic 

 structure. 5. Consistency. 6. Changes in medium. Same as sur- 

 face colonies. 

 STAB CULTURES (Gelatin or Agar). 



I. Non-liquefying. 



