150 
APPENDIX. 
Skeleton similar in form to Furnarius cunicularius, and the other species of this genus. 
li> 
Length of sternum 11 
Breadth anteriorly 6 
posteriorly 7 \ 
Depth of keel 4§ 
of fissures 4 
Breadth of ditto If 
Length of pelvis 12 
Breadth anteriorly 3f 
posteriorly 10J 
Length from occiput to point of hill 18 
Breadth of cranium 7 \ 
Length of coracoids 9 
No. of cervical vertebrae 11 
dorsal ditto 7 
sacral ditto 12 
caudal ditto . 7 
Total 37 
No. of true ribs 5 
false ditto 21 
Total 8 
OPETIORHYNCHUS PATAGONICUS. G. R. Gray. (Male.) 
No difference in the structure of the soft parts from the other species of the genus before spoken of. 
The trachea, however, does not differ from the ordinary simple form found in most birds, but 
differs from O. vulgaris and O. antarcticus , in having the lower rings continued to the bronchi* 
it is acted upon by one pair of muscles ; no ceeca are apparent. 
inches 
Length of oesophagus, including proventriculus 2| 
gizzard j 
inches 
Breadth of gizzard § 
Length of cutis from gizzard to cloaca 5| 
Skeleton in form similar to that of Furnarius cunicularius, and the other species of 
this genus. 
lines 
Length of sternum 13 
Breadth anteriorly 6| 
posteriorly 8| 
Depth of keel 5 
fissures 4 
Breadth of ditto 1J 
Length of pelvis 13J 
Breadth anteriorly 5 
posteriorly 10| 
Length from occiput to point of bill 19 
Breadth of cranium 8 
Length of coracoids 10 
No. of cervical vertebrae 11 
dorsal ditto 7 
sacral ditto 9 
caudal ditto 6 
Total 33 
No. of true ribs 5 
false ditto 2'1 
Total 8 
Remarks : — the last five species approach so nearly, that I doubt the propriety of separating 
them generically. The skeletons are only distinguishable with the exception of the form of the 
bill, by the proportions between the different admeasurements. 
PTEROPTOCHOS TARNII. G.R.Gray. (Female.) 
Tongue pointed, armed with two strong lateral spines, and a few intermediate smaller ones at the 
base ; oesophagus largest at the upper extremity, and gradually becoming smaller towards the 
proventriculus ; no vestige of a craw ; proventriculus of moderate size, not much contracted 
towards the gizzard, which is also of moderate size, and much flattened ; not very muscular, 
and lined with a hardened coat, rugose longitudinally; the gizzard was filled with small 
1 
