CELLARIA SINUOSA. Ill 



The mere shape of the cells is of little moment, as they 

 exhibit marked varieties of pattern on the same speci- 

 men, being sometimes rhomboidal, and sometimes arched 

 above, and sometimes almost quadrangular. There are 

 also great differences in the number of the rows of cells 

 composing the cylinder. 



The avicularia are commonly placed obliquely ; but in 

 some cases the broad triangular mandible points straight 

 downwards ; they occur in larger numbers than on C. 

 fstulosa. The ovarian opening is pierced, as it were, in 

 the wall, at the upper extremity of the cell, just above the 

 orifice. On its lower margin there is sometimes to be 

 seen a broad denticle ; but it is either often absent or is 

 difficult to detect. Busk represents it as bicuspid; it 

 may be so at times ; but as I have met with it it has a 

 perfectly plain straight top. 



The shoots are attached by a mass of tubular fibres, 

 each of which originates within the area of a cell, towards 

 the base of it ; they frequently cover the lowest inter- 

 node. The tubes are simple, often of considerable length, 

 and give off short processes at the extremity, which form 

 a rude kind of adherent disk. 



This handsome species grows in large tufts, from 3 to 4 

 inches in height, or even more. 



The distinction between C. sinuosa and C. fistulosa has 

 been so imperfectly appreciated that localities for the 

 present form must be accepted with caution. I have 

 only given those which seem to be beyond question. It 

 has no doubt a more general distribution than these 

 would indicate. 



