LETTERS RELATING TO PHOLAS. 
79 
bo found again. As a nestling it was remarkably flat-headed, 
and possessed of a disproportionately large gape. 
Young Nightjars are very narrow across the head, and looking 
from above on another pair which were nearly full-grown, it 
was seen that their eyes projected. Long before they are full- 
grown they can use their wings well, as any one will find out who 
tries to chase them. One thing which is noticeable in a young 
Nightjar is, the bow-like distention of the lower mandible. It 
does not seem that the young aro always fed on insect food ; 
at least, a nestling, accidentally killed and opened for examination, 
contained nothing but vegetable fibres and seeds resembling buck- 
wheat seeds. My gardener, who considered them as such, also 
matched the fibres with the stamens of Honeysuckle, and though 
Mr. Southwell thinks this doubtful, 1 must say that the two 
corresponded precisely. Incubation lasts nineteen days. 
VIII. 
LETTERS RELATING TO THOLAS. 
By Lord Walsixgitam, F.II.S. 
Read 28th January, 1S00. 
In looking over the collection of Shells here, I was lately reminded 
by one of the labels that my father had more than once mentioned 
to me the finding of a new species of Pholas, which in his youth 
he had obtained by dredging near Gosport. The specimens were 
labelled as follows : “ These Pholas different from any before 
discovered, were dredged up, off Hill Head near Gosport.” 
In turning out some letters from an old cabinet I was fortunate 
enough to find two letters from Dr. Goodall, then Provost of Eton. 
He refers in these letters to these specimens, or rather to a similar 
one, which must have been sent to him for identification. 
l)r. Goodall was well known as an enthusiastic concliologist. 
Several shells have been named after him by different authors. 
