DESCRIPTION OF PLATE I. 
In illustration of Mr. Rose's Paper on Parasitic Borings 
in Fossil Fish-scales. 
Fig. . 
1. — Borings in a cycloid scale {Osmeroides f\ from the lower chalk of 
West Norfolk. 
1 a magnified 35 diameters. At c, in this figure, is shown the 
confluence of two tubes at their commencement. 1 &, a por- 
tion more highly magnified. 
2. — Borings in another scale, magnified 135 diameters. 
3. — Borings in a scale of Prionolepis angustus, from the lower chalk ; 
magnified 135 diameters. 
4. — A variety of the last, from another scale, perhaps placoid, obtained 
from the lower chalk. 
5. — Borings in fragments of a Fish-scale, from shales of Kimmeridge 
clay. 
a, a. The specimen from which these are taken has lost the 
external lamina, therefore the borings lie between the two 
laminae, or in an inferior one. 
&, h. This specimen has the external lamina on it. 
c. The external lamina is in this figure situated at d. 
