LIASSIC FORMATIONS. 
51 
The bones of the limbs are dislocated and dispersed in the way and degree common 
to the specimens of this animal hitherto discovered (Auckland, loc. cit., pi. xxvii; and pis. 
XVII and XVIII of the present Monograph). The scapula (PI. XVII, 51) and coracoid 
(ib., 52) in the same anchylosed condition as in the first-described specimen, are at the end 
of the slab opposite to that with the head. The corresponding humerus (53), preserved in a 
separate portion of the block of Lias, shows the entire contour of the pectoral process {d). 
The right humerus (53') lies below the dorsal vertebrae (n) ; the upper part of the pectoral 
process (5) is wanting, but the obtuse thickening of the end of that remarkable pro- 
duction is well shown. The ridge (c) called ‘ ulnar,’^ descending from the ‘ lesser 
tuberosity,’ appears in this view of the ‘palmar’ surface of the bone.^ The sigmoid 
flexure of the shaft is much better marked than in the humerus of Fterodactylm suevicus? 
The stronger walls of the humerus have resisted the pressure better than those of 
most of the other long bones. 
Of the antibrachial bones parts of the shafts, crushed, are seen at 54, 55, apparently 
of the right wing. With the distal ends of these, the right carpus (56) and metacarpus 
(57) appear to have retained their natural connections. The slender metacarpals of the 
first (i), second (n), and third (m) digits appear emerging from beneath the left hind 
foot which overlies their proximal ends. The phalanges of the first digit (i), two in 
number, preserve their natural articulations. As are also those of the second digit, three 
in number. The metacarpal of this digit is longer by lines than that of the first. The 
additional phalanx would seem to be the proximal one, by its shortness : the second 
phalanx more nearly agrees in length with that supporting the claw-phalanx in the first 
digit; but it is thicker and a little longer. The four phalanges of the third digit (m) are 
dislocated ; but the penultimate, which is the longest, retains its connection with the 
ungual phalanx. The proximal phalanx is longer than the second, which resembles in 
length, and seems homotypal with, the proximal phalanx of the second digit. It may be 
concluded, therefore, that the additional phalanx to n and m was developed at the 
attachment of the digit to the metacarpus. The largely and abruptly expanded meta- 
carpal of the fourth digit is in great part covered by the correspondingly thickened and 
much elongated phalanx (/j>; 1) therewith articulated. The olecranoid process of this 
phalanx is well shown, and the entire bone is preserved : its length is 4 inches 2 lines : it 
is bent directly and abruptly back upon its metacarpal. To the distal end is attached 
part of the second phalanx {jy, 2) . 
The proximal phalanx of the left wing-finger is preserved in a detached {ir, 1) part of the 
slab (PI. XVIII) containing the major part of the skeleton. The second phalanx (/j. 2') of the 
left wing-finger lies in that slab, is entire, and yields a length of 4 inches 9 lines. The third 
1 ‘Monograph on Fossil Eeptilia of Cretaceous Formations,’ Soppl. No. iii, 1860, p. 14, pi. iii, 
fig. 1, c. 
2 Op. cit., 190. 
2 Quenstedt, op. cit., cl, c r. 
