ON RHAMPHORHYNCHUS BUCKLANDI 151 
7. An abdominal rib. 
8. The proximal end of a rib, apparently Pterosaurian, with a 
distinct capitulum and tuberculum. 
Out of the great number of detached teeth from Stonesfield in 
the Oxford Collection, I could find none of Péerosauria, nor is there 
a fragment of a mandible. 
In the Collection of the Royal College of Surgeons there are 
several Pterosaurian remains from Stonesfield named P. Buckland: : 
among them is a proximal phalanx of the long finger, 73 inches 
long ; a left external metacarpal, 1? inch long; and a bone which is 
described by Professor Owen in the ‘ Catalogue’ as a tibia. 
From what I have just stated, it is obvious that it is impossible 
to compare the mandibles I have described with the corresponding 
parts of the species named Prerodactylus Bucklandi, inasmuch as 
none such exist; but, since a specific name published without a 
description has no authority, I shall not hesitate to affix the name 
of Rhamphorhynchus Buckland? to the nearly perfect mandible from 
Stonesfield, and, provisionally, to the other remains from the same 
locality. If, however, it should turn out that the separation of the 
Sarsden mandible as a distinct species is necessary, it will be a 
further question to determine to which of the two mandibles the 
other bones respectively belong. For the present I will speak of 
them all as remains of R. Buckland?. 
I have seen no vertebre from Stonesfield, nor any part of the 
skull or pelvis. There is, however, in the Museum of Practical 
Geology a very well preserved coraco-scapular bone (Pl. NXIV. 
[Plate 10] fig. 4). This fossil. was presented, among other bony 
fragments from the Stonesfield slate, by the late Marchioness of 
Hastings. The bone was originally greatly obscured by the 
matrix; but on clearing the latter away with great care, I 
brought to view a considerable portion of the right pectoral arch of 
a Pterodactylian reptile of considerable dimensions. The coracoid 
bone is almost entire; but only a small portion of the scapula 
remains. 
The coracoid measures 3,°; inches in length; but it was probably 
3th of an inch longer, as the extremity of its anterior process is 
broken off. 
In the middle of its length, its section is nearly circular and 4th 
of an inch in diameter; but anteriorly (or externally) it becomes 
flattened from side to side, while posteriorly (or internally) it also 
becomes flattened, but in a plane at right angles to that of the 
anterior end. Its posterior extremity attains half an inch in width ; 
