ee wards vegetables. 
They move notwithstanding. Three kinds 
376 NOTES OF ALGÆ. 
spared, would probably have become a distinguished Bo- 
tanist. 
Tas. IX. Fig. 1. Portion of a spike with unexpanded 
flowers; f. 2. Petal and stamen ; f. 3. Pistil and squamæ ; 
f. 4. Ovary laid open to show the solitary ovule ; f. 5. 
Nut :—magnified. HH 
- 
Notes of AuG& observed at different altitudes in A berdeenshire, 
by G. Dicxiz, M.D., Lecturer on Botany in the University 
and King's College of Aberdeen. 
(Continued from p. 206 of this volume.) 
The former paper was devoted solely to remarks on 
Desmidiee collected at different altitudes during a short 
excursion, into the interior of Aberdeenshire: the present 
communication will comprehend the other Alge observed 
upon the same occasion. 3 5s 
With the exception of the Diatomacee and Oscillatorve@, — 
the productions, about to be noticed, have not given rise to 
such disputes respecting their true nature, as those alrea®y = 
discussed. Still, the Zoospores of certain species, shortly after oe 
emission, have certainly been described as animals, and place" — 
among the Infusoria; their further development has ge —— 
. rise to statements that animals, in some cases, become after. Se : 
The motions of certain species of Oscillatoria are at least | 
y distinct as those of any organisms usually CONSO". 
sec | to the vegetable kingdom, and yet it has | v 
nied that they possess any independent power of motio" ; 
~ be observed in them ; first, the oscillating, one end of the 
_ filament being fixed, the other describing a ne 
a circle with greater or less rapidity ; second, a dist nc 
* Hassall, British Fresh-water Algæ. 
