AVES. 
73 
Since the publication of his former paper on this subject 
(Zool. Rec. ii. p. 86), the author has had occasion to find that 
the diffused condition of the respiratory apparatus is less rare 
than he had supposed, and adduces examples dissected by him 
of Argala dubia and Buceros hicornis in support of his .view. 
Murie, James. On Cygnus buccinator , Richardson, and C. 
passmorii, Hincks. Proc. Zool. Soc. 1867, pp. 8-13. 
A careful comparison of the differences observable in parts of 
the osteology of some specimens of American Swans, leading to 
the conclusion that C. passmorii is not specifically distinct from 
C. buccinator. The sterna of both are figured. 
. On the tracheal Pouch of the Emu (Dromceus nova- 
hollandi( 2 y Vieill.). Tom. cit. pp. 405-415. 
The bibliography of this remarkable structure is first given, and 
then a very minute description of it, illustrated by figures. Its 
function, the author is inclined to suppose, may be that of a sexual 
organ of sound during the breeding-season. It is considered to 
be homologous with the tracheal sac of the Chamuileon, and in 
this light to be another proof of the Reptilian affinities of the 
Struthiones. 
. On the dermal and visceral structure of RhinochetuSy 
Eurypyguy and Cancroma. Tom. cit. p. 475. 
To be published hereafter in the Society’s ^ Transactions.’ 
Owen, R. On Dinornis (Part IX.) : containing a description of 
the Skull, Atlas, and Scapulo-coracoid Bone of the D. robus- 
tuSy Owen. Trans. Zool. Soc. v. pp. 337-358, pis. liii.-lvi. 
A continuation of the author’s well-known series of valuable 
memoirs on this group of birds. The head is very minutely de- 
scribed. The scapula and coracoid are confluent, as in ApteryoCy 
but the latter is relatively much broader. There is no trace of 
a glenoid cavity for the articulation of a wing, but in its place a 
rough ridge to which any rudiment of a humerus, if such existed, 
must have been attached ; Prof. Owen, however, thinks that fore 
limbs were entirely wanting in this bird. 
. On Dinornis (Part X.) : containing a description of part 
of the Skeleton of a flightless Bird indicative of a New Genus 
and Species [Cnemiornis calcitranSy Ow.). Trans. Zool. Soc. 
V. pp. 395-404, pis. Ixiii.-lxvii. 
This form (Zool. Rec. ii. p. 138) was remarkable for the ex- 
traordinary development of the epicnemial, procnemial, and ec- 
tocnemial processes of the tibia. It also differed from Dinornis 
by possessing wings, though they were too short to admit of 
flight. The remains described and figured consist of cervical 
and dorsal vertebrae, pelvis, portions of the sternum, humerus, 
femur, tibia, fibula, and metatarsus. The femur of Aptornis and 
metatarsus of Dinornis geranoides are also figured. 
