LEPRALIA. 311 
Hab. On Pecten opercularis, coast of Ayrshire, D. L. 
Dr. Johnston, in doing me the honour of dedicating this 
Lepralia specifically to me, accompanies the compliment 
with language dictated by all the partiality of friendship. 
“ Laudari & laudato” would be very sweet, were there not a 
depressing sense of great shortcomings. When on another 
occasion a friend had given the specific name of Landsburgii 
to a shell, I said jestingly to the friend who told me of it, 
“Ts it possible to sail far down the stream of time in a 
scallop?” ‘ Yes,” was the reply, “the name that is written 
on Nature will be had in remembrance, when sceptres are 
broken, and thrones overturned, and dynasties have passed 
away.’ The humble name in question is so faintly in- 
scribed, that the rough wave of time will soon totally efface 
it; but there is a higher and more permanent honour that 
we should all supremely court,—that our names be written 
in the book of life; then, when the sun, and the moon, and 
the stars are darkened, we shall shine with the brightness of 
the firmament for ever and ever. 
I have never seen this Lepralia since the specific name 
was given to it. ‘Two specimens were found ; one was sent 
by me to Dr. Johnston, and the other lost before he had 
time to examine and name the one sent. I attempted to 
