140—6 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
wliicli seeiriKS to be distinguislied from that of L. argala merely by its inferior size. 
The dimensions of the three Siwalik specimens are as follows : — 
Anterp-posterior diameter of inferior Burface . . 1'32 1-2 0-93 
Transverse ditto ....... I’Oo 0’93 0'71 
There is a fourth imperfect specimen in the British Museum (No. 48,444) 
agreeing very closely with No. 39,734. 
Metatarsus. — The distal extremity of the left metatarsus is represented in plate 
R., figs. 14, 14a, 14b, of the “ F.A.S.,” and in plate XIV., fig. 14 of this volume ; 
and is in the British Museum. It is considerably larger than the corresponding bone 
of a large L. argala (the respective transverse diameters being T3C and T25), but 
presents no difference in form. The proximal extremity of a right metatarsus is 
represented in figs. 9, 9a of the same plate^ of the “ F.A.S.” (B.M., No. 39,741) ; 
which is smaller than the corresponding bone of a full-sized L. argala. 
Pedal phalangeal. — The bone represented in plate XIV., fig. 12, was obtained by 
Mr. Theobald from the Siwaliks of the Punjab: it is the first phalangeal of the 
outer (fourth) digit of the right foot ; and is practically indistinguishable from the 
corresponding bone of L. crumeniferus, and agrees therefore in size with the smallest 
tibia. 
'Femur. — The distal extremity of the left femur is represented in plate R., figs. 
4, 4a, 4b of the ‘‘F.A.S.” (B.M., No. 39,737). This specimen is indistinguishable 
in form from the femur of L. argala, but is of rather larger size than a large 
specimen of that species ; the respective transverse diameters of the two bones being 
1-77 and 1-48. 
Humerus. — The distal extremity of the left humerus is represented in pi. XIV., 
fig. 1, and is likewise in the British Museum: it is indistinguishable from the 
humerus of L. argala, except in its slightly superior size ; the respective dimensions 
being as follows : — 
L. falconeri. L. argala. 
Transverse diameter at condylar tuberosities . . . 2'3 2-1 
,, ,, of condyles 1'75 1‘5 
Phalangeal of the manus. — The proximal third of the first jDlialangeal of the wing 
is in the Cautley collection of the British Museum (No. 39,738), and is represented 
in plate R., figs. 8, 8a, 8b, 8c, of the “ F.A.S.” It differs from F. argala merely by 
its slightly superior size, and by the circumstance that the lateral lamelliform 
expansion rises rather more abruptly. 
Distinctness and affiMities. — The foregoing specimens indicate the existence of one 
or more species of stork in the Siwaliks, some individuals of which were of consider- 
ably larger size than the largest specimens of L. argala, while others were not larger 
than L. crumeniferus. As there is a considerable amount of variation in the size of 
the former S29ecies, and as there appears to be no distinctive structural differences 
between the limb-bones of the fossil form and of the three living species, it seems 
imjDOssible to say whether the former includes more than one species ; and equally 
1 The figures show the posterior and superior aspects. 
