LIASSIC FORMATIONS. 



51 



The bones of the Hiiibs are dislocated and dispersed in the way and degree common 

 to the specimens of this animal hitherto discovered (Biickland, loc. cit., pi. xxvii ; and pis. 

 XVII and XVIII of the present Monograph). The scapula (PI. XVII, 5l) 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 (d) ; the upper part of the pectoral 

 process (i) 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 Fterodadylus 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 (ni) digits appear emerging from beneath the left hind 

 foot which overlies their proximal ends. The phalanges of the first digit (i), tw^o 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 2^ 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 M'ith, the proximal phalanx of the second digit. It may be 

 concluded, therefore, that the additional phalanx to 11 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 {jy^ 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 (/,-_ 2). 



The proximal phalanx of the left wing-finger is preserved in a detached (/'', 1) part of the 

 slab (PI. XVI II) containing the major part of the skeleton. The second phalanx (/,; .. ) 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 Reptilia of Cretaceous Formations,' Siippl. No. iii, 18G0, p. 1-4, pi. iii, 

 fig. 1, c. 



2 Op. cit., 190. 



3 Quenstedt, op. cit., c I, c r. 



