FOR romiS AXD QUAIJTir.F. 21 



guishably small, so that they approach to the doited surface. 

 When they are larger, the surface is called scrohicidaie (.s'cro^ 

 h'icidatus). When, in the last place, the hollows are conti- 

 guous, and have a regular structure, the surface is said to be 

 honeycombed (favosus^ alveolatus). 



When the depressions are linear, they are called furroro 

 (sulci), and the surface is said to be furrowed (sidcatufi). 



When the depressions are intersected by raised lines of a 

 net form, the surface is said to be reticulated (reticulatws)^ 

 (Tab. VTII. Fig. 6, 7.) ; and when these lines run together 

 into distinct regular squares, tlie surface is called tessellated 

 (tessellatus). The surface is streaked (lineatus), when paral- 

 lel straight lines run through it, and are frequently elevated, 

 and frequently also of \'arious colours. 



A part is said to be striated, when fine straight lines, which 

 project but a little, are seen running longitudinally on it. 



Ringed {anmdatus) is commonly applied to a roundish or 

 tubular body, when it shews small circular prominences and 

 depressions ; Conferva muralis. If these rings go quite 

 through the body, like true partitions, the tube is called scp- 

 tata ; Puccinia, Didymosporium Nees. 



Rifted (rimosus), is applied to a surface, when it has small 

 deep and regular clefts. When these form small fields, these 

 latter spaces are called areola;, and the surface is said to be 

 areolata {Lecideafumosa, atro-alba). 



A furrowed surface, where the spaces between the furrows 

 are raised in folds, is said to be folded (plicaius). 



Undulated (undidatiis) is a surface which rises and sinks 

 successively in gentle lines. When this bending and sinking 

 are very irregular, the surface assumes a crispid appearance, 

 (crispus). 



27. 



There are still some other apparently foreign substances, 

 which form a covering on plants. To these belong 



Hoariness (pru'ma), which makes the surface hoary {pruU 

 nosus). It is a fine, commonly a bluish substance, which is 



