104 Mr. F. Tovvnsend on a supposed new species of Glyceria. 



The walls were much the thickest on the north side, nearly 

 double those on the south, measuring IJ foot through. 



It being in a locality where sand and gravel abounded, their 

 materials were freely mixed with the clay. 



The covered ways leading from the base to objects of plunder 

 at a distance were in this case larger and more numerous than 

 any I have seen before. The main one measured 12 inches in 

 diameter, and gave off several branches which proceeded in va- 

 rious directions. These were traced to sticks, stumps and logs, 

 which afforded them prey. 



In this case the labourers in the hill were generally of the 

 smaller class, while those in the covered ways and in the stumps 

 were larger, having strong, stout jaws, well-adapted to the gnaw- 

 ing of wood. The " royal chamber " was found raised about l^ 

 foot above the level of the ground. 



Hill 3rd. — Circumference at base, 50 feet. Height, 14 feet. 



The notes do not state whether this is the perpendicular height 

 or not. Several fresh turrets were erected on the top, having a 

 moist, deep red, granular appearance. 



The structure called the '^ royal chamber " measured externally 

 10 inches in length, intei-nally 8 inches. Its height from the 

 level of the ground was 2 feet 8 inches. The length of the queen 

 4| inches. 



Shrubs or small trees are frequently seen growing up through 

 the hills. Such trees are never seen dead, consequently are not 

 eaten by the insect. 



XI. — On a supposed new species of Glyceria. 

 By Frederick Townsend, B.A.* 



In 1846 I drew up a description of a supposed new species of 

 Glyceria, which had probably been confounded with other de- 

 scribed species, viz. G.fluitans and G.plicata ; and a paper on the 

 three plants was read before the Botanical Society of Edinburgh 

 on November 9 in that year, but for the purpose of adding the 

 results of further observations, it was not then published. Re- 

 vised characters for, and some remarks upon, the three supposed 

 species are now again submitted to the Society. 



In my former paper I applied the name of G. hijbrida to the 

 new plant ; but as the use of that word might lead to erroneous 

 theoretical conclusions, I now substitute the name of G. pedicel- 

 lata. The specific characters may stand as follows : — 



1. Glyceria fluiians (11. Br.). Panicle simple, elongate, sub- 

 sccund, spreading whilst in flower, otherwise close ; branches 



* Read before the Botanical Society of Edinburgh Dec. 13, 1849. 



