On Omosaurus Phillipsi (Seeley). 
By H. Gr. Seeley, F.R.S., Honorary Member of the Yorkshire 
Philosophical Society. 
The remains of terrestrial reptiles from the Coralline Oolite 
are recorded as Megalomurm Bucklrnidi, and there is no doubt 
that the superb tooth in the Museum of the Yorkshire Philo¬ 
sophical Society is correctly referred to Megalosaiirus, unless 
allied genera should prove to have teeth of the same type; but 
till some parts of the skeleton are known which will permit of 
comparison with the type from the Stonesfield slate, it may be 
premature to affirm that the species is the same in both deposits. 
During a recent visit to the Museum I was able to add 
another terrestrial reptile to the list in the identification of a 
femur which is referable to a small species of Omosnurus , 
unless that name should give place to Priodontognathm. 
The specimen has upon it the following label, which is an 
excellent example of a scientific record of discovery : “ Found 
A.D. 1838, on the Earl of Carlisle’s estate at Slingsby, 
Yorkshire, imbedded in a thin stratum of earth and calcareous 
matter between two of the upper strata of limestone in a 
quarry three quarters of a mile east of the village of Slingsby, 
and 50 yards south of the high road to Malton. The lowest 
rise in the north side of the Howardian Hills here forms a 
gentle knoll-shaped elevation having a diameter of three to 
four hundred yards.” 
This femur is at present in three fragments. The proximal 
end is somewhat compressed, and a slight slip in the rock has 
cut obliquely through the distal end of the bone, without any 
great displacement. When the three pieces are put together 
they leave no doubt that they once formed a single bone, which 
was twenty-five inches long. This left femur is straight with 
the proximal and distal ends nearly in the same plane. The 
distal end is moderately thickened from front to back, though 
the inner condyle is a little broken, and both the proximal and 
distal ends are much wider from side to side than the shaft, 
which has concave sides and is somewhat slender. 
