150 



APPENDIX. 



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



Length of sternum 1 1 



Breadth anteriorly " 



posteriorly ''h 



Depth of keel '^ 



of fissures ■* 



Breadth of ditto 1 j 



Length of pelvis 12 



Breadth anteriorly 3^ 



posteriorly 10| 



Length from occiput to point of hill 18 



Breadth of cranium 7^ 



Length of coracoids 9 



No. of cervical vertebrie 11 



dorsal ditto 7 



sacral ditto 12 



caudal ditto 7 



Total 37 



No. of true ribs 6 



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 bronchiaj 

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



Length of oesophagu?, including proventriculus 2J 



gizzard \ 



Breadth of gizzard | 



Length of cutis from gizzard to cloaca b\ 



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

 this genus. 



No. of cervical vertebra! 11 



dorsal ditto 7 



sacral ditto 9 



caudal ditto 6 



Total 33 



Length of sternum 13 



Breadth anteiiorly 6J 



posteriorly 8J 



Depth of keel 5 



fissures 4 



Breadth of ditto 1} 



Length of pelvis 1 3^ 



Breadth anteriorly 5 



posteriorly 10^ 



Length from occiput to point of bill 19 



Breadth of cranium 8 



Length of coracoids 10 



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. 



No. of true ribs 5 



false ditto 2-1 



PTEROPTOCHOS TARNII. G.R.Gray. (Female.) 

 Tongue pointed, armed with two strong lateral spines, and a few intermediate smaller ones at the 

 base ; cEsophagus 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 



