42 



MR. C. BAILEY ON THE STRUCTURE ETC. 



Phucagrostis. Fig. 29^ Plate VI., shows the scales of 

 Naias major in situ ; one of the scales is drawn separately 

 in fig. 30 on the same Plate. 



The auricles in their turn vary in shape and size,, but I 

 have not met with them so regularly oval nor so acute as 

 they are represented in Braun's figure (fig. 14, Plate VI.) ; 

 on the contrary, I never find them acute, and, though 

 somewhat parallel-sided, they gradually taper from their 

 base to their elongate truncate apex (see figs. 52 & 54). 

 More often than not the auricle is larger on one side than 

 the other, as in figs. 54 & 55. The auricles are confined 



Kg. 54- 



Kg. 55. 



principally to the first pair of leaves of each fascicle, and 

 the sheaths of the pair embrace the leaf; most often these 

 are the only leaves in the fascicle which possess auricles 

 (see Delile^s figure on Plate V. fig. 4). The next pair of 

 leaves has auricles which, when present, form a more acute 

 sinus with the lamina (fig. 55) ; but as we approach the 



