BIRDS. 



149 



With the exception of being larger than Furnarius cunicularius, and in having the bill more 

 bent and longer, the skeleton presents no material difference from that of the above-named bird. 



Length of sternum 13 



Breadth anteriorly 6 



posteriorly 7^ 



Depth of keel 4 



of fissures 4 



Breadth of ditto 1 



Length of pelvis 14J 



Breadth anteriorly 4 



posteriorly 9] 



Length from occiput to point of bill 27 



Breadth of cranium 8 



Length of coracoids 11 



No. of cervical vertebrae 11 



dorsal ditto 7 



sacral ditto 11 



caudal ditto 6 



Total 35 



No. of true ribs 5 



false ditto 2-1 



Total 8 



OPETIORHYNCHUS VULGARIS. Gray. (Male.) 



The structure of the soft parts, both in this species of Opetiorhynchus, and the two following 

 ones, so closely resemble that of Furnarius and Uppucerthia, that one description will almost serve 

 for the whole ; those differences that do exist being not more than are generally found in species of 

 the same genus ; the external characters also being slight, I cannot but doubt the propriety of 

 separating them ; the caeca are slightly developed in this species, measuring i inch in length. 



Length of oesophagus, proventriculus included 2^ 



of gizzard § 



Breadth of ditto \ 



inches 

 Length of intestinal canal from gizzard to the cloaca . . 7J 

 from caeca to cloaca 5 



Skeleton similar in form to that of Furnarius cunicularius. 



Length of sternum Hj 



Breadth anteriorly 5\ 



posteriorly 7^ 



Depth of keel 3| 



of fissures 5 



Breadth of ditto H 



Length of pelvis 12f 



Breadth anteriorly 4 



posteriorly 9ij 



Length from occiput to point of bill 17 



Breadth of cranium 7 



Length of coracoids 8J 



No. of cervical vertebrae 11 



dorsal ditto 7 



sacral ditto 1 1 



caudal ditto 7 



Total 36 



No. of true ribs 5 



false ditto 2-1 



OPETIORHYNCHUS ANTARCTICUS. G. B. Gray. (Male.) 



Structure of the soft parts as in O. vulgaris, but with the rectum of rather larger diameter, and the 

 caeca very minute ; gizzard filled with the remains of insects. 



Length of oesophagus, including proventriculus 1\ 



gizzard | 



inches 

 Breadth of gizzard \ 



Length of intestinal canal from gizzard to cloaca ...... 7 



