: 
ON THE FAUNA AND FLORA OF THE TRIAS OF THE BRITISH ISLES. 155 
Note. 
CONTENTS OF REPORTS ON FOOTPRINTS. 
Report, 1908. Introduction and description of forms A 1 to3, K, B 1 and 2, and L. 
904. . Description of D 1 to 5, E, F 1 and 2, Iand M. 
» 1905. Description of footprints in Warwick Museum. 
», 1906. Description of A 4 (manus only), D 6, C and O. 
1907. Description of A 4, D 7, and F 3, and of Liverpool University slab 
of footprints by Mr. J. Lomas. 
», 1908. Description of tracks of invertebrates, &c. Part I. 
» 1909. Description of P and summary to date. 
Explanation of Plate III. 
Two natural casts of footprints described as ‘ P’ in present report from the Lower 
Keuper of Storeton in H. C. Beasley’s collection. 
No. 1] is in high relief, about 3 inches; No. 2 not more than 1} inch. There 
are other markings of uncertain origin on both slabs. The scale shown is one of 
6 inches, 
Ona Skull of Rhynchosaurus in the Manchester Museum. 
By D. M. S. Watson, B.Sc. 
Rhynchosaurus is probably the best known of all the Triassic Rhyncho- 
cephalia, and an excellent account of its osteology, by Dr. A. Smith 
Woodward, was published in the Report of this Committee presented 
at the York meeting of the Association. This report shows that our 
knowledge of the base and back of the skull is defective, and as a specimen 
in the Manchester Museum shows some new features in this region, it 
seems worthy of some description. 
This skull was collected by Mr. G. C. Spence in 1895 from the quarry 
at Grinshill, which is the type locality. Mr. Spence roughly developed 
the anterior portion of the palate, and in 1907 presented the specimen 
to the Museum. When I first saw it, it was contained in two small 
‘ blocks of coarse sandstone, which fitted together. One of these blocks 
retains the nasals and premaxille, and is separated from the other by 
a split, which cuts the palate about 1.5 cm. in front of the transpalatines. 
The other block contains the main mass of the skull, and now shows the 
whole of both upper and under surfaces, together with the posterior 
surfaces of the quadrates. 
The matrix is a coarse and very hard sandstone, the bone is extremely 
soft, so much so that it falls away as dust, after being exposed for a few 
days, when subjected to the jarring inevitable to the process of develop- 
ment; the skull is thus very largely represented by an internal cast, to 
which a certain amount of bone remains attached, forming a thin white 
layer ; nevertheless, certain points are exceedingly well displayed. 
I am unable to add anything to the account given by Dr. Woodward 
of the anterior part of the skull. 
The brain-case widens out posteriorly, and lateral processes are 
given off which underlie the corresponding inwardly directed processes 
of the squamosal. There is, however, certainly a bone overlying the 
squamosal, and apparently running straight across from side to side 
without any connection with the parietals: this bone is probably a 
separate ossification, the epiotic of the Stegocephalian skull. 
The squamosal is a triradiate bone; it differs from that figured by 
