268 PROFESSOR OWEN ON CNEMIORNIS. 
proximal row, it answers to the “os magnum ” (ib. fig. 10, m). The base of the meta- 
carpal coalesced therewith is indicated, on the palmar side, by the prominence (1m). The 
stunted “index” metacarpal (11) has coalesced by its. entire length with the contiguous 
base of the “ medius” metacarpal (111), and its supporting carpal (m). The head of the 
“annularis” metacarpal is likewise indicated by the prominence (Iv) on the sternal side, 
where it has coalesced with the contiguous part of the base of the ‘‘ medius” (11). 
From this attachment the shaft of 1v bends slightly ulnad, and then runs parallel with 
an interspace about 14 line in breadth to near the distal end, which again coalesces 
with that of the “medius.” This coalescence is chiefly along the thenal side of the 
bones; on the opposite, anconal, or dorsal side the primitive separation is shown by a 
groove. 
The head of the index metacarpal (fig. 10, 11) is more tumid, but less extended radiad, 
in Cnemiornis than in Cercopsis; and the distal articulation (11') for the proximal phalanx 
of the index digit is less definite: such rudiment of that finger (commonly called the 
“thumb” by ornithologists) was probably tied by ligament to its metacarpal. 
The tendinal groove impressing lengthwise the anconal surface of the shaft of the 
mid metacarpal is less marked in Cnemiornis than in Cereopsis. The distal articulation 
(fig. 11) is similar in both: it is quadrate, flattened on the radial half, and swelling into 
a condyle on the ulnar half. The distal articular surface of the ‘‘ annularis” metacarpal 
(1v') shows more of the typical form, viz. two narrow condylar convexities, with a 
trochlear depression between them. 
I have not recognized phalanges in either series of Cnemiornis remains which have 
reached me, and have restored them in the figure of the entire skeleton (Pl. XX XIX. fig. 1) 
according to the analogy of Cereopsis—the radial digit or index (11) being represented 
by a proximal phalanx, the median digit (111) by three phalanges, and the annular digit 
(rv), again, by the proximal phalanx only. 
To the characters of the pelvis described and figured in my former monograph I am 
able to add, through Dr. Hector’s description, the configuration of the entire part,as shown 
in the restoration of the skeleton (Pl. XX XIX. fig. 1). The ischium, of which the slender 
continuation from the acetabulum was shown in fig. 7, 63, of pl. 64 (tom. cit.), loses thick- 
ness and gains vertical breadth as it recedes, and, coalescing with the hind end of the 
ilium, circumscribes a great ischiadic foramen, of an oval figure, nearly 3 inches long by 
i inch deep. ‘The pubis unites with the end of the ischium, a “ foramen ovale” inter- 
vening nearly 5 inches in length and 10 lines at the broadest part, with the canal for 
the passage of the “ obturator internus” tendon!, indicated, as usual, by a low process 
rising from the upper border of the pubis, and a corresponding one descending from the 
opposite part of the beginning of the ischium. Both processes are present in Cereopsis, 
as in Cnemiornis; but only the upper or ischiadic one marks out the “ obturator” notch 
1 & Myology of Apteryx,” Trans. Zool. Soc. iii. 292. 
