12 BiiUrtiu Wn^consint^atural History Society. [Vol. 6, Nos. 1 — 2. 
to a comparison with rockweeds, the essential features of which it 
possesses in a large degree, although no fruit has been observed. 
The genus Fucus is not on record for so low a horizon, but 
there is no valid reason why it should not be found in the Middle 
Devonian, as well as the laminarie?e. I designate it as Fucus 
hcriheletensis. 
