Reports and Proceedings—Geological Society of London. 47 
across the beach until below low-water line. As the sea washed 
away the base, the mass continued to sink, and fresh horizons were 
denuded. In 1905 a series of heavy ‘ground-seas’ cast up blocks 
of limestone and ironstone, containing crocodile bones, which were 
discovered on the sand between high- and low-watermarks. The 
skull came ashore in six pieces. Fragments of bones and scutes 
were constantly picked up; and the author is indebted to 
Prof. IT. McK. Hughes for the block which had been picked up 
and sent to the Sedgwick Museum at Cambridge. The specimens 
were derived from a horizon 80 to 90 feet below the top of the 
Wealden Shales. A history of the British Goniopholide from the 
foundation of the genus by Owen in 1841 is given, and it is noted 
that the frame in the Mantell Collection, now in the British Museum, 
not only contains the two type-blocks, but a smaller one with the 
impression of the orbital region of the skull, a fragment of the 
frontal bone, and the impression and fragments of a moiety of 
the right ramus. The skull and bones of the new specimen are 
next described, and a detailed comparison is instituted between 
G. simus and G. crassidens, with the result that the specimen 
is referred to the latter species, differing in several important 
particulars from the former. Comparisons are also made with 
other species of Gondopholis, with Nannosuchus, and Oweniasuchus. 
In conclusion, the author notes that, while in certain features the 
species come nearer to the ‘Teleosaurs than G. simus, it is farther 
removed than the latter from them in the position of the posterior 
. nares. 
II. — December 5th, 1906.—Sir Archibald Geikie, D.C.L., Sc.D., 
See. R.S., President, in the Chair. 
- The following communications were read :— 
1. ‘*On the Geological Conditions which have contributed to the 
Success of the Artesian Boring for Water at Lincoln.” By Professor 
Edward Hull, M.A., LL.D., F.R.8., F.G.S. 
This boring has its source of supply in strata which rise to the west, 
but to the east dip down towards the North Sea. There exists no 
information as to whether the eastern border of the water-bearing 
formation thins out against a concealed ridge of Paleozoic rocks. 
The water-yielding stratum is reddish, soft, porous sand-rock, reached 
at a depth of 1,561 feet and penetrated to a depth of 474 feet. About 
one million gallons of water rise to the surface daily. The sand-rock 
belongs to the New Red Sandstone, which crops out from York to 
Nottingham with a breadth of about eight miles. The hydraulic 
pressure at the bottom of the boring is that due to about 2,035 feet, 
and the friction of the water in percolating the rock accounts for the 
fact that the water can be pumped down during the day but rises 
again in the night. The formations penetrated are the following : 
Alluvium and Lower Lias 641 feet, Rhetic beds 52 feet, Red Marl 
and» Lower Keuper Sandstone 868 feet, Bunter Sandstone 454 feet. 
The quantity of water drawn from the New Red Sandstone, at and 
below the outcrop defined, amounts to not le&s than 20 million gallons, 
