51 
Explanation or plate so. 
I'Ugei and superior Plate overlapping the edges of 
tlie next subjacent and smaller plate. These edges 
(/' ^^ndered more irregular by decomposition. 
signified representation of very minute curved lines 
passing fiom the marginal band across the shaft, 
at d. 
Thin lamina of the white pulverulent substance of a 
decomposed Plate ; it retains partial traces of the 
transverse wavy fibres. 
/• Minute perpendicular filaments prevailing over the 
^ transverse fibres of the shaft. 
'g- 3. Fossil Loligo from Lyme Regis, shewing the same 
structure as the preceding figures, in the several 
portions of the Pen that are preserved ; and having 
Its Ink bag distended nearly in its natural shape and 
place beneath the Pen. (Original.) 
C. C. Axis of the shaft. 
Tigs. 4. 5. 6. 7. 8. 9. Fossil Ink bags from Lyme Regis. 
The membranous sacs and excretory ducts are still 
preserved, and closely resemble those of a recent Ink 
p Tag, see PI. 28. fig. 5. (Original.) 
'g- 10. Fossd ink bag found by Miss Anning in the 
Lias near Watchet, Somerset. (Original.) 
Plate 30. V. 1. p. 309. 
^ lai ge fossil pen of Loligo ; from the Lias at Lyme Regis. 
n the collection of Miss Philpot. (Mrs. Buckland. 
Original.) 
lbs of the pen, proceeding from the outer edges 
^ ^ot the marginal bands. 
Maiginal bands dividing the bases of the barbs 
0. A internal part or body of the shaft. 
xis of the Pen, dividing the body of the shaft into 
t'vo equal parts. 
