EXPLANATION OF THE PLATES AND WOOD-CUTS, 



Fig. 20 to 23. Paludina Deccanensis. Short, conical, pointed, rounded at the base ; 

 whorls 5 or 6, slightly convex, aperture round. Fig. 21 is in chert from Munnoor ; 

 and figs. 20 and 22 in indurated clay from between Munnoor and Hutnoor, the 

 cavity of the shells being filled with calcedony. The young shell has a slight carina 

 shown in fig. 20. Fig. 23 appears to be a crushed specimen ; it is in laminated, 

 indurated clay, Munnoor. This shell occurs, with Physa Prinsepii, in a beautiful 

 green siliceous mineral at Munnoor ; at Chicknee, and at the bottom of the Neer- 

 muU pass. All the specimens natural size. 



WOOD-CUTS. 



Section of the Bangnapilly Diamond Mines : p. 54L 

 Section of the Lonar Lake and surrounding rocks : p. 562. 



WOOD-CUT. 



Map of part of Mazunderan to illustrate Dr. C. M. Bell's Geological Notes of a Jour- 

 ney from Tehran across the Elboorz Range to the Caspian, and back to Tehran 

 along the course of the Heraz River : pp. 577, 581. 



PLATE XLVIII. 



Map and Sections to illustrate Mr. W. J. Hamilton's memoir on part of Asia Minor 

 between the Salt Lake of Kodj-hissar and Caesarea of Cappadocia. The map is 

 constructed from original documents. The descriptions engraved on the plate 

 explain sufficiently the range and nature of the Sections : p. 583 et seq. 



WOOD-CUT 



To illustrate Mr. Strickland's notice of some remarkable Dikes of Calcareous Grit, at 

 Ethie, in Ross-shire : pp. 599, 600. 



PLATE XLIX. 



Outline Map of part of the western coast of South America to illustrate Mr. Darwin's 

 memoir on the connexion of certain volcanic phenomena in South America ; and 

 on the formation of Mountain Chains and Volcanos, as the effect of the same 

 Power by which Continents are elevated : p. 601 et seq. 



WOOD-CUTS. 



Diagrams copied principally from Mr. Hopkin's memoir on Researches in Physical 

 Geology, (Trans. Phil. Soc. Cambridge, vol. vi. pp. 45, 51.) to illustrate slow ele- 

 vatory movements in the formation of mountain-chains : p. 625. 



Diagram explanatory of the effect which would be produced if the thickness of the 

 crust of the earth, upturned by elevatory movements, were equal to the distance 

 between the anticlinal Hues : p. 627. 



PLATES L. to LVIIL 



Illustrate Prof. Sedgwick and Mr. Murchison's memoirs on the Physical Structure of 

 Devonshire, and on the Subdivisions and Geological Relations of its older stra- 

 tified deposits : p. Q'i'i et seq. 



