198 
INTESTINAL STRUCTURE 
Intestinal Structure of Fossil Fishes. 
Discoveries have recently been made of Co- 
prolites derived from fossil fishes. Mr. Mantell 
has found them within the body of the Macro- 
poma Mantellii, from the chalk of Lewes, placed 
in contact with the long stomach of this vora- 
cious fish : the coats of its stomach are also well 
preserved.* Miss Anning also has discovered 
them within the bodies of several species of 
fossil fish, from the lias at Lyme Regis. 
Dr. Hibbert has shown that the strata of 
fresh-water limestone, in the lower region of 
the coal formation, at Burdie House, near Edin- 
burgh, are abundantly interspersed with Copro- 
lites, derived from fishes of that early era ; and 
Sir Philip Egerton has found similar foecal 
remains, mixed with scales of the Megalich- 
thys, and fresh-water shells, in the coal for- 
mation of Newcastle-under- Lyne. In 18.32, 
Mr. W. C. Trevelyan recognized Coprolites in 
* See Mantcll’s Geol. of Sussex, PI. 38. I learn from Mr. 
Mantell, that the form of the Coprolites within the Macropoma 
most nearly resemble those engraved, PI. 15, Figs. 8, 9, of the 
present work : he also conjectures that the more tortuous kinds, 
(PI. 15, Figs. 5, 7), long known by the name of Juli, and sup- 
posed to be fossil fir cones, may have been derived from fishes 
of the Shark family, (Ptychodus) whose large palatal teeth (PI. 
27./) abound in the same localities of the chalk formation with 
them, at Steyning and Hamsey. 
