App. a*.] Dr. PiTTON on the Strata below the Chalk. 349 



lonnois ; where also other smaller species of this genus occur. This species is named after the 

 late Mr. Goodhall, F.G.S., an indefatigable collector of fossils, and remarkably liberal in affording 

 the use of them to inquirers. 



The Wood-cut at p. 129. represents a portion o{ Nautilus plicatus, one third of the original size. 

 The parallel linear furrows which pass over the whorls, are bent three times at acute angles, once 

 on each side and once in the middle, the central angle being directed backwards. There is often 

 some irregularity in the junction of the lines at the angles. 



APP. A*. 



FIGURES OF VEGETABLE REMAINS. 



Sphenopteris gracilis. — The wood-cut at p. 181 represents the impression of a species of fern, 

 discovered in the Hastings-sands, near Tonbridge Wells, by the Rev. W. L. Pope of that place. 

 It has been referred to the genus Sphenopteris of Adolphe Brongniart*, notwithstanding its acu- 

 minate pinnulse, and a certain degree of resemblance to Odontopter is minor, (Brongn. Veg. Foss. 

 PI. Ixxvii.), on the ground of its apparent affinity to Sphenopteris Mantelli (Ibid., p. 170. Pl.xlv. 

 fig. 3 — 7) ; its pinnulae having a midrib, but no lateral veins. This specimen was accompanied 

 by the impression of a species very nearly allied to, and perhaps no more than a variety of, 

 Sphenopteris Mantelli. 



PLATES XIX. AND XX. 



Endogenites erosa. — The description of the plates representing the external form and internal 

 structure of this singular fossil will be found above; (85.) to (89.), p. 172, 176. After those 

 pages had been printed, two remarkable varieties of the form were discovered, in cutting down the 

 cliffs near the W hite Rock at Hastings ; in which the stony nucleus was not only very irregular 

 in figure, but apparently divided into flat lobes, disjoined, or scarcely connected by very thin 

 flakes of stony matter ; the whole being externally coated with lignite, which occupied the en- 

 tire thickness of the fossil in the intervals between the lobes. The form and mode of connexion, 

 or apposition, of these stony nuclei, when divested of their covering, were such as to suggest a com- 

 parison with some varieties of Cactus. 



PLATE XXII. 



All that is known of the Cones and cone-shaped body. Figures 9, 10, and 11, of this plate, is 

 mentioned in the list of fossils, at pages 181, 230, and 290. A section of that represented in 

 fig. 11. on its longer diameter, did not exhibit any indication of vegetable structure : but the ge- 

 neral resemblance in the outline and aspect of this specimen to part of the reduced figure of 

 Zamia horrida given in Dr. Buckland's plate, (Geol. Trans. 2nd Series, vol. ii. PI. xlviii. fig. 4.) 

 is, perhaps, deserving of notice. 



A Cone has recently been found on the shore of the Isle of Portland, not improbably derived 

 from one of the beds of clay, or " Dirt", subordinate to the lower part of the Portland strata, 

 the structure of which, according to Mr. Brown, approaches in some respects to that of Arau- 

 caria. I am indebted to the kindness of the Rev. David Williams, of Cross, near Bleadon in So- 

 mersetshire, to whom it belongs, for an opportunity of submitting this beautiful specimen to the 

 examination of Mr. Brown, who will, I hope, describe its structure in the Transactions of the 

 Linnaean Society. 



* Prodrome, &c., p. 50. — Hist, des Veg. Fossiles, p. 169. 



