48 
SIR DAVID BREWSTER ON THE CRYSTALLINE LENSES OF ANIMALS. 
ing the lens and removing the laminae. The four septa require nice observation to 
be seen. One of the three was inclined about 45° to one of the four septa. The other 
lens of this turtle has most distinctly four septa, but only two on the other side." A 
similar variation of structure has already been referred to as existing in the lenses of 
the horse and the whale. 
Belleville hy Kingusie, 
Xovember 14 th, 1835, 
