116 
two-thirds of the under mandible yellow, apical third blackish brown ; 
feet yellow. 
Total length, 33 inches; bill, 1; wing, 1}; tail, 13. 
Hab. Columbia. 
Remark.—Nearly allied to P. Eremita and P. pygmea, but dif- 
fering from them in being of a larger size, in the total absence of any 
crescentic black mark on the chest, in having the throat clouded with 
dark grey instead of buff, and the two central tail-feathers tipped 
with grey and their shafts black. 
4. Nore on THE SuBORBITAL GLAND OF THE NYLGHAU. 
By H. N. Turner, Esa., Jun. 
Among the cranial characters of the genus Portaz I have adduced 
the want of a suborbital depression, and the existence of a smooth 
line running along the surface of the bone; and as I had observed 
appearances of a suborbital sinus in the living animal, which I could 
not detect in the dried specimens, I felt much interested in the exa- 
mination of the parts in one that recently died in the Gardens, and 
which Mr. Mitchell kindly forwarded to me for dissection. 
Externally there is a slight pit immediately in front of the orbit, 
and anteriorly to it a small longitudinal fold of the skin, in the middle 
of which is a little round pore, through which exudes a yellowish 
secretion, furnished by a gland placed just underneath. The gland 
itself is slightly larger than a hazel-nut, and is laid upon the surface 
of the bone without any fossa to receive it, but is firmly attached to 
the smooth line before observed. The tendo oculi, and a few fibres 
of the orbicularis palpebrarum are attached to it. 
The small pit immediately in front of the orbit is merely the space 
below the tendo oculi, between the gland and the rim of the orbit. 
In the Nylghau, the existence of a “lacrymal sinus” has usually 
been acknowledged ; but it affords a good example of the incertitude 
with which we can ever deny that it exists in a species of which fresh 
specimens have not been examined with a view to this character, and 
in which no traces of the organ are discernible, either in the dry skin, 
or in the existence of a fossa in the skull. 
Pimlico, March 1851. 
5. Letrer on THE DEAL-FISH, FROM Dr. DucGuIpD To 
Dr. BARKER. COoMMUNICATED BY Mr. YARRELL. 
“ Kirkwall, 5 March 1851. 
“In April 1829, I received from Mr. Strang, Sanday, a specimen 
of a fish which had been found on the shores of that island, with a 
request that I should give him some information about it. He men- 
tioned that he had met with many specimens during a series of 
years,—that it was well known to the natives of the island, by whom 
it was called the Deal-fish, and that they often found it thrown 
ashore, and even occasionally used it as food. I easily ascertained, 
from the works to which I had access, that it was a fish unknown to 
