PKOCEEDIXGS OF GEOLOGICAL SOCIETIES. 
S51 
Sandstone of Malta is a small Tbecidiura, nearly allied to T. ^Tediterranea, 
but much smaller tlian that species, and, on close inspection, having 
other and very decided specific distinctions. Mr. Macdonald gave a de- 
tailed description and figures of this new species, and proposed for it the 
name of Thecidium Adatnsii. 
5. " On the Sandstones and Shales o'f the Oolites of Scarborough, with 
descriptions of new Species of Fossil Plants." By J. Leckenby, Esq. 
The true position of the well-known plant-bed at Gristhorpe Bay, be- 
low the grey limestone, was first pointed out by Professor Williamson, 
and afterwards by Dr. Wright ; and Mr. Leckenby showed that all the 
plants hitherto referred to the Upper Sandstone, Shale, and Coal, belong 
to the Lower Sandstones and shales, but few plants having been found 
in the true Upper Sandstones and shales overlying the grey limestone. 
The author gave lists of fossil plants occurring in the two sets of strata, 
as -well as of those occurring at the separate localities ; and he con- 
cluded by describing some new and some imperfectly known species of 
Ferns. 
6. " A Monograph of the Ammonites of the Cambridge Greensand." 
By H. Seeley, Esq. 
The excavations in the Upper Greensand of Cambridge have furnished 
Mr, Seeley with an opportunity of examining a great number of specimens 
of the different species of Ammonites occurring in that formation, and he 
now communicated the results of his examinations to the Society, giving 
detailed descriptions of the species. 
7. " On a new Crustacean from the Glasgow Coal-field." By J. W. 
Salter, Esq. 
In a previous paper the author collected together what was known of 
the Macrurous Crustaceans of the British Coal-fields ; since then, Mr. 
James Eussell has discovered a new species, remarkable on account of the 
antennules being larger than the antennae, and which Mr. Salter now de- 
scribed in detail. 
8. " On the Occurrence of a Bituminous Subsiance near Mountgerald, 
Scotland." By Dr. G.Anderson. 
The section exposed by some deep cuttings for the Eoss-shire Railway, 
two miles north of Dingwall, exhibits a grey, micaceous, and almost hori- 
zontal conglomerate, traversed b}' fissures containing a black bituminous 
substance, which the author stated might have infiltrated down from a bed 
of bituminous schist which apparently overlies the conglomerate. 
9. " On the Occurrence of Albertite at Mountgerald, Scotland.'* By 
A. C. ^lackenzie, Esq. 
In making a drain on a farm near Mountgerald, a fissure was discovered 
which contained a bituminous substance very similar to the Albertite of 
New Brunswick ; a deposit of a similar nature was also discovered in 
making a cutting through " The Crag," near Mountgerald. The author 
described the stratigraphical and lithological characters of the rocks met 
with in making this cutting, and stated that as many as thirty-six veins 
containing this mineral were passed through. 
10. " On the Occurrence of Rocks of Upper Cretaceous Age in Eastern 
Bengal." By Dr. T. Oldham. 
During the years 1851-52, the author examined the rocks of the Khasi 
Hills, in Eastern Bengal, and made a collection of the fossils occurring 
there. These fossils were mostly from a JS^ummulitic Limestone, and were 
evidently of Eocene date; but some were obtained from a sandstone 
underlying this limestone, and appeared to be of Cretaceous rather than 
