198 INTESTINAL STRUCTUUE 
Intestinal Strncture 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 1832, 
Mr. W. C, Trevelyan recognized Coprolites in 
* See Mantell's Geol. of Sussex, PL 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 conjectm-es that the more tortuous kinds, 
(PL 15, Figs. 5, 7), long known by the name of'Jidi, and sup- 
posed to be fossil fir cones, may have been derived from fishes 
of the Shark family, (Ptychodus) whose large palatal teeth (PL 
11. f) abound in the same localities of the chalk formation with 
them, at Steyning and Hamsey, 
