166 THE OLD RED SANDSTONE. 
cetacez, such as the porpoise, the teeth are inserted in sockets. 
In the ichthyolites of this formation, so far as these are illus- 
trated by its better specimens, the teeth, as in existing fish, 
are merely placed flat upon the jaw, or inshallow pits, which 
seem almost to indicate that the contrivance of sockets might 
be afterwards resorted to. Immediately over the sandstone 
The scales were, however, of a larger size, some of them exceeding 
three inches in length, and one eighth of an inch in thickness. Upon 
my visit to the quarry, I found the scales, as in the Yellow Sand- 
stone, most abundant in those parts of the rock which exhibited a 
precciated aspect. Many patches a foot in length, full of scales, 
have occurred ; but as yet no entire impression of a fish has been 
obtained. 
‘Another scale, DIFFERING FROM THOSE ALREADY NOTICED, (see 
Plate IL., fig. 3, ‘figure of an oblong tubercled plate traversed diagonally by 
lines, which, bisecting one another a little above the centre, resembles a St. 
Andrew's cross, and marked on the edges by Saintly radiating lines,’) is 
about an inch and a quarter in length, and an inch in breadth. In 
external appearance it bears a very close resemblance to some of the 
scales on the common sturgeon, and may, with some probability, be 
referred to an extinct species of the genus Accipenser.’’ — (Cheek’s 
Edinburgh Journal, Feb. 1831, p. 85.) 
‘Dr. Fleming, in 1830,” says Dr. Anderson, “read before the 
Wernerian Society a notice ‘on the occurrence of scales of vertebrated 
animals in the Old Red Sandstone of Fifeshire.’ These organisms, 
as described by him, occurred in the Yellow Sandstone of Drum- 
dryan and the Gray Sandstone of Parkhill. From the former 
locality scales of a fish were obtained. . «© . »« + «© «© «© «© « « 
The same paper (Professor Fleming’s) contains a notice of sIMILAR 
SCALES in the Old Red Sandstone of Clashbennie, near Errol, in 
Perthshire, ovr or wuicH is described as bearing ‘a very close re- 
semblance to some of the scales on the common sturgeon, and may 
with some probability be referred to an extinct species of the genus 
Accipenser.’’’ — (Professor Jameson's Edin. New Phil. Journal, Oct. 
1837, p 138.) 
