41 
We may look upon it perhaps as the Laminaria of the period. 
Its presence is therefore important when it enables us to determine 
horizons in the Jurassic Series which we might otherwise have difficulty in 
doing. 
On Mont Cray above Chateau d' Oex (Canton de Yaud) I have seen it 
covering the surfaces of the dark grey limestones and shales, for the space 
of many square yards ; its graceful plumes overlapping one another, so 
thickly were they crowded together : at other places in the same formation 
perhaps scarcely a trace of it is to he seen, and yet other fossils seemed to 
me very much more scarce. 
It not only occurs in he Alps, but seems to be characteristic of the 
Inferior Oolite (Bajocien) in the South of France. 
M. Bleicher (Revue Scientifique 26th October, 1872,) describes it as 
occurring in the Basses Cevennes, in rocks where other fossils seem locally 
very scarce. 
Our specimen was found at Eakledown quarry, Dundry, in the Inferior 
Oolite. I have presented it to our local Museum. 
The species which have been hitherto described are, as far as I knew the 
following. — 
Z. Caput Medusae (Massolongo) from the Eocene of Monte Bolca. 
Z. Villoe (Mass:) from the Upper Cretaceous beds of Mid-Italy. 
Z. Brianteus (Villa sp:) from the Upper Cretaceous of Italy. 
Fucoides Brianteus (Villa 
And Gorgonia ? Targioni (Savi and Menegh :) 
Z. Scarabellii (Mass:) from Miocene beds of Sassotello (near Bologna.) 
Z. ferro-equinum (Heer) from I. Oolite of Canton de Vaud. 
Z. procerus (Heer) from I. Oolite of Canton de Vaud. 
Z. scoparius (Thioll: sp.) 
Chondrites scoparius (Thiolliere) from I. Ool. of Canton de Vaud, 
S. France, &c. 
VI. 
On the Collection op Upper Greensand Fossils in the Bristol 
Museum. 
By E. Tawney, F.G.S. 
Read before the Geological Section, Bee. 11th, 1872. 
[Abstract.] 
The author of this paper after alluding to these fossils, which are nearly 
all from the Blackdown Hills, as one of the treasures of the Geological 
