ON RHAMPHORHYNCHUS BUCKLANDI 155 
characteristic of it. Looking at the bone as a whole, the inner mar- 
gin is concave anteriorly, straight posteriorly ; while the outer margin 
is straight or a little convex anteriorly, and concave posteriorly. 
The Rev. Mr. Witt has also very obligingly permitted me to. 
examine his collection of Pterosaurian bones and teeth from Stones- 
field. In addition to many fragments of finger-bones, it contains the 
shafts, with their articular ends broken off, of several humeri, the 
largest of which must have been nearly the size of that in the Oxford 
Museum. Besides this, there is the moiety of a proximal phalanx of 
the long finger (PI. XXIV. [Plate 10] fig. 9), which displays very well 
the character of the proximal articular end of that bone; and there 
are among the teeth, almost all of which are those of Tedeo- 
saurta, two long, curved, and pointed ones, which, from the absence 
of striz on their surface, and their general characters, I suspect to be 
Pterosaurian. 
It is possible to form an estimate of the minimum size of the 
Stonesfield Pterosaurian, on the assumption that all the remains 
which have been described are of one species; for, as all the bones 
of the long finger and its metacarpal have been obtained, it is 
clear that the finger and the hand must have been at least as long 
as the sum of the measurements of these detached bones. Now, as 
there is a 
Distal phalanx. . . . . 64 inches long 
3rd phalanx... ..... 7% =~, s 
and phalanx. ...... 7% ,, fs 
Proximal ........ 7% 4 s 
Metacarpal 2 <4 7 it is clear 
that finger and hand attained at least 31% inches in length. 
Then, as in Rhamphorhynchus the fore-arm is more than twice as 
long as the metacarpal, and as there is a humerus 3} inches long, 
40 inches will not be far from the length of one wing, and 7 feet may 
be safely assumed as the minimum distance between the extremities 
of the two wings, of the largest Rhamphorhynchus Bucklandt, any of 
whose remains have yet been found. 
