PROCEEDINGS OF OEOLOOICAL SOCIETIES. 
elongated tubcvcles on the surface of the casts. The larger s))iues do not, how- 
ever, ap])ear to have been (juite so close together as in the preceding species. 
Therefore, although P. Jimbriadix possesses mucii similarity in character to 
P. inoidatus ; it may be easily distinguished by the elongated oval shape of 
its valves. P. Jimhriaf/cs is found at Hill Head, in Lanarkshire, at three 
iiundred and seventy-one fathoms below the " Ell coal ;" also at Middleholm, 
near Lcsmahago. In Stirlingshire, in the Campsie main-limestone. In Ayr- 
shire, at West Broadstouc, Baitli ; Meadowfoot, near Drunclog ; Cessnoek, 
parish of Galston. It has also been found in the Lotliians and in Fife- 
sliire. 
(To be continued.) 
PROCEEDINGS OF GEOLOGICAL SOCIETIES. 
Geological Society of London, Januarij 4, 1860. — Prof. J. Phillips, 
President, in the Chair. 
" On the Plora of the Silurian, Devonian, and Lower Carboniferous Forma- 
tions." By Prof. H. R. Goeppert, For. Mem. G.S. 
The number of all the fossil plants which the author lias described as belong- 
ing to these formations (chiefly from Germany) amounts to one huudi-ed and 
eighty-foiu- species : Algse, thirty species ; Calamineae, twenty ; Asterophyllitese, 
4 ; FiLices, sixty-four ; Selaginese, thirty-nine ; Cladoxyleae, four ; Noeggera- 
thise, eight ; Sigillarise, six ; Coniferse, six ; Fruits (uncertain), three. Prof. 
Goeppert has seen only Algse from the SUuriau Rocks. Sigillaria Hausmanni 
is one of the most interesting of the Lower Devonian plants mentioned ; and 
Saffenaria Weltheimiana, of the Middle Devonian. The Upper Devonian has 
several teiTcstrial plants. Of the Lower Carboniferous Flora, the following are 
the most important and characteristic plants : — Calamites transitionis, C. Roe- 
meri, and Sagemria Weltheimiana. The last name supersedes Kmrria imbri- 
cata. 
" On the Freshwater Deposits of Bessarabia, Moldavia, WaUachia, and Bul- 
garia." By Capt. T. Spratt, R.N., C.B., F.R.S., F.G.S. 
Capt. Spratt first referred to the many isolated patches of freshwater deposits 
in the Grecian Ai-chipelago and in the neighbouring countries, also around the 
Black Sea, to which others have alluded or which have been described by him- 
self as evidences of the existence of a great freshwater lake, probably of middle 
tertiary age. 
On the borders of the Yalpnk Lake, in Southern Bessarabia, are sections ex- 
hibiting old lacustrine deposits containing similar fossils to those found else- 
where by Capt. Spratt in the strata refen-ed by him to the extensive oriental 
lake of the middle tertiary period. Among these fossils are freshwater cockles ; 
such as are associated with Breissina polt/morpka in the strata at the Darda- 
nelles and elsewhere. After some search Capt. Spratt found similar cockles 
livmg in the Yalpuk lake ; and from this evidence, and from the relatively dif- 
ferent levels of the old lacustrine deposits and the present Black Sea, he satis- 
fied himself of the really freshwater condition of the old tertiary lake ; the 
Black Sea area having been separated from the old lacustrine area of Bessara- 
