EXPLANATION OF THE PLATES. 



Plate 1, 2. — Fossil fishes to illustrate Sir P. G. Egerton's paper on the 



Ganoidei Heterocerei To face p. 10 



3-8. — To illustrate Dr. Carpenter's paper on the structure of Num- 



muUna, Orbitolites, and Orbitoides 38 



9, 10. — Fossil shells to illustrate Mr. Moore's paper on the tertiaries 



of San Domingo 52 



11. — Map to illustrate Mr. Austen's paper on the English Channel. 96 



12, 13. — To illustrate Mr. Sharpe's paper on Nerincea 115 



14-26. — Fossil shells, &c., to illustrate Mr. Sharpe's paper on the 



Secondary Rocks of Portugal 200 



27, 27his.— To illustrate Mr. Fletcher's paper on Dudley Trilobites... 238 



28, 29. — Fossil shells, corals, &c. to illustrate Dr. Mantell's paper 



on the Geology of New Zealand 342 



30. — Fossil shells to illustrate Mr. R. Mantell's paper on the Oolite 



of Wilts 319 



31. — Section to illustrate Mr. E. Hopkins's paper on the structure 



of the Andes 366 



32.— To illustrate Mr. Fletcher's paper on Dudley Trilobites 405 



ERRATA. 



Page 52, line 4 from bottom, for oxygonum read oxygonus. 



— 115, — 17 from top, for Secretary read President. 



— 190, and Plate XXI. fig. 1, Tellina Sohralenais is erroneously stated to be 



from subcretaceous beds between Sobral and Torres Vedras; it 

 belongs to the "Almada Beds" of the Tertiary Series, having 

 been found at Portella, about four miles north of Lisbon on the 

 road to Saccavem. The original specimen was received mixed 

 with others from the former locality, and the error was only 

 discovered after the publication of the paper. This species 

 must therefore be struck out of the lists at pp. 154, 172, and 200. 



— 331, line 7 from top, dele Eschara: Pl. XVIII. f. 8. 



— 370, — 10 from top, for Cerbero read Cerholi. 



— 454, — 2 from top, after Ammonites read biplex, Sow. 



Directions to the Binder. 



The Binder is directed to place at p. 190 the loose slip issued with No. 24, and 

 containing the erratum respecting Tellina Sobralensis. 



