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. 
lines 
Length of sternum 13 
Breadth anteriorly 6 
posteriorly 7\ 
Depth of keel 4 
of fissures 4 
Breadth of ditto 1 
Length of pelvis 14^ 
Breadth anteriorly 4 
posteriorly 9| 
Length from occiput to point of bill 27 
Breadth of cranium 8 
Length of coracoids 11 
No. of cervical vertebras 11 
dorsal ditto 7 
sacral ditto li 
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 fhe 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 -h inch in length. 
inches 
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 | 
Skeleton similar in form to that of Furnarius cunicularius. 
lines 
Length of sternum Ilf 
Breadth anteriorly 5\ 
posteriorly 7J 
Depth of keel 3f 
of fissures 5 
Breadth of ditto lj 
Length of pelvis 12| 
Breadth anteriorly 4 
posteriorly 9| 
Length from occiput to point of bill 17 
Breadth of cranium 7 
Length of coracoids 8| 
No. of cervical vertebrae 11 
dorsal ditto 7 
sacral ditto 11 
caudal ditto 7 
Total 36 
No. of true ribs 5 
false ditto 2-1 
Total 8 
OPETIORHYNCHUS ANTARCTICUS. G. H. 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 
gizzard 
inches 
inches 
• i 
Breadth of gizzard 
Length of intestinal canal from gizzard to cloaca 
7 
