1,50 



APPENDIX. 



Skeleton similar in form to Furnarius cunicularius, and the other species of this genus. 



No. of cervical vertebrae 11 



Length of sternum 11 



Breadth anteriorly 6 



posteriorly 7J 



Depth of keel 4| 



of fissures 4 



Breadth of ditto 1| 



Length of pelvis 12 



Breadth anteriorly 3jj 



posteriorly 30J 



Length from occiput to point of bill 18 



Breadth of cranium 7^ 



Length of eoracoids 9 



dorsal ditto 7 



sacral ditto 12 



caudal ditto 7 



Total 37 



No. of true ribs 5 



false ditto 2 1 



Total 8 



OPETIORHYNCHUS PATAGONICUS. G. B. 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 bronchise 

 it is acted upon by one pair of muscles ; no casca are apparent. 



Length of oesophagus, including proventricums 2| 



gizzard i 



Breadth of gizzard a 



Length of cutis from gizzard to cloaca 51 



Skeleton in form similar to that of Furnarius cunicularius, and the other species of 

 this genus. 



Length of sternum 13 



Breadth anteriorly 6| 



posteriorly 8| 



Depth of keel 5 



fissures 4 



Breadth of ditto 1* 



Length of pelvis 13^ 



Breadth anteriorly 5 



posteriorly 10^ 



Length from occiput to point of bill 19 



Breadth of cranium 8 



Length of eoracoids 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 



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 



