Reports and Proceedings. 41 
not occupy amygdaloidal cavities, as the zeolites. They cleave 
readily across, and show an oblong, six-sided section, which also 
breaks up into little cuboidal pieces. The size of the largest 
erystals is about six lines in length, by three in breadth. They are 
very abundant in some of the traps near Paisley and at Langbank on 
the Clyde, and have been found on the Campsie Fells and in Arran. 
The composition of the Ferrite from Langbank is as follows :—Water, 
834; soluble silica, 2°56; insoluble silica, 18°33; carbonate of 
lime, 4°41; iron-oxide, 66:21: total, 9985. It is harder than the 
Paisley variety, the analysis of which is given above. The silica 
is there marked as 21°33; it might have been divided, however, 
-thus :—Soluble silica, 11°80 ; insoluble silica, 9:53; total, 21°33. 
NorwicH GEOLOGICAL SocterTy, in connection with the Norfolk 
and Norwich Museum.—At a meeting, December 6th, Mr. J. O. 
Harper read a very instructive paper on the comparative anatomy 
of Rodents, illustrated with numerous specimens, among others 
several of the Trogontherium Cuvieri (a gigantic fossil Beaver 
found in the Forest-bed at Bacton, Norfolk), from the Museum and 
Mr. Gunn’s collection. The discussion was adjourned to the next 
Meeting, when specimens of the Beaver (Castor Europeus) will be 
produced, it is hoped, for comparison, and with the view to clear up 
the doubts, which have been expressed by eminent Palzontologists 
who have visited the Norwich Museum, as to whether a small jaw 
in that collection is that of a young Trogontherium, or of the common 
Beaver. Mr. J. S. Offord undertook to have casts made of a femur 
and caleaneum of the Trogontherium for the Norwich Museum, and 
also for private distribution. Very fine specimens of a tooth of 
Tapirus priscus, and of three teeth and part of the jaw of Hyraco- 
therium leporinum, from the Red Crag of Felixstow, were exhibited 
from the collection of Mr. Waters, of Manchester, and teeth of Sws 
paleocherus, obtained from the Red Crag of Sutton, by Mr. J. H. 
Roper. of West Tofts, near Brandon, who has made a good collection 
from that deposit. For the identification of these teeth with speci- 
mens described by Professor Owen (Quart. Journ. Geol. Soc. vol. 
xii. p. 217 and Trans. Geol. Soc. 2nd Series, vol. vi. p. 203, pl. 21) 
the members are indebted to Mr. Henry Woodward, of the British 
Museum. 
MANCHESTER LITERARY AND PHILOSOPHICAL SoclETY.—Nov. 29, 
1864. Mr. R. D. Darbishire read a paper entitled ‘ Notes on Marine 
Shells found in Stratified Drift at Macclesfield, and exhibited a 
series of specimens. The shells were collected from beds of sand and 
gravel exposed in the formation of the new Cemetery, at an elevation 
of 500 to 600 feet above the level of the sea. These beds are gene- 
rally horizontal, but exhibit great irregularities of extension, level, 
and false-bedding. They rest on the ‘ Lower Boulder-clay.’ 
The whole of the 50 shells are ordinary British species, with the 
exception of four whose highest northern range is on our extreme 
south-west coast, namely Cytherea chione, Cardium rusticum, Car- 
dium aculeatum(?), and Areca lactea. 
