EXPLANATION OF THE PLATES. 



Plate VL 



Fig. 1. represents a part of the White-rock at Hastings, where the concretionary 

 masses of calciferous sandstone i, &, are to be seen in situ. 



Fig. 2. exhibits some of these masses a, a, fallen down at East-cliff: c shows the ap- 

 pearance of the rocks when they are worn by the sea after falling. 



Fig. 5, 6, 7, 8, 9, 10, 11. represent organic remains found at Hastings, and described 

 in p. 35. 



Fig. 3. Section of the strata in the N.-E. end, and upper part of the Isle of Portland, 

 in illustration of Art. IV. p. 37. 



Fig. 4. Fossil wood, the situation of which is represented in Jig. 3. — on a larger scale. 



PLATES VIL VIII. & IX. 



Illustrate Mr. Miller's paper on Belemnites. Art. V. p. 44. &c. : — and on the Genus 

 Actinocamax. Art. VI. p. 63, &c. 



Plate VII. 



Fig. 1. The conical chambered shell of the Belemnite taken out of the guard. — The 

 figure represents the external slightly rugged shell, to which the laminae of the 

 guard adhere ; also the probable depth of the outer chamber, with the aperture 

 of the siphunculus : see p. 50, &c. 



Fig. 2. Section to show the form of the siphunculus in the conic-chambered shell. 



Fig. 3. Section to show the chambers, which are filled with calcareous spar. 



Fig. 4. A magnified representation of the section of the siphunculus, showing its lami- 

 nar structure, and its adhesion to the external conic shell. 



Fig. 5. A magnified representation of the transverse septa in the chambered cone, 

 showing their laminar structure, and their adhesion in common to the shell. 



Fig. 6. Belemnites elongatus (see p. 60.), taken from two portions in Mr. Miller's 

 collection, one of which, as here represented, shows the projecting of the cham- 

 bered shell beyond the guard, and the depth of its outer chamber. The dotted 

 line marks the space occupied by the cone. 



Fig. 7. A longitudinal section of Belemnites elongatus, showing the laminar struc- 

 ture of the guard, and the chambered cone in part surrounded by its shell in loco : 

 p. 60. 



Fig. 8. A transverse section of B. elongatus, with a concave septum belonging to the 

 chambered cone in the centre : p. 60. 



Fig. 9. Belemnites abbreviatus : see p. 39. 



Fig. 10. Transverse section of B. abbreviatus, with a concave septum in the centre, 

 belonging to the chambered cone : p. 39. 



VOL. II. — SECOND SERIES. U 



