WIL 569 



par rapport aux Sources nrinerales de ces contrees). Mayence, 1828, 

 &.F6russ. Bull. 1829, XVI. p. 189. 



WlLLEMET ( ). 



1. Observations sur les Perles que Ton trouve dans les Huitres de la 

 Lorraine. Journ. de Phys. VI. p. 145. Mod. B. Helm. 



WILLEMS (M.). 

 1. Belgisch Museum ; vide sup. Pars I. p. 38. 



(David). 



1. On the several ravines, passes and fractures in the Mendip Hills 

 and other adjacent Boundaries of the Bristol Coal-field, and on the 

 geological period when they were effected. Proc. Geol. Soc. IT. 

 p. 79. Phil. Mag. ser. 3,~V. p. 220. 



2. On the Bones of certain Animals which have been recently dis- 

 covered, in the Calcareo-magnesian Conglomerate on Durdham 

 Down, near Bristol. Proc. Geol. Soc. II. p. 112. Phil. Mag. ser. 3, 

 VI. p. 149. 



3. On certain Fossil Plants from the opposite Shores of the Bristol 

 Channel. Rep. Brit. Assoc. 1835, Sect. p. 63. 



4. On the Raised Beaches in Barnstaple or Bideford Bay Trans. Geol. 

 Soc. ser. 2, V. p. 287. Proc. Geol. Soc. II. p. 535. Phil. Mag. 

 ser. 3, XL p. 117. 



5. On some Fossil Wood and Plants recently discovered in the Grau- 

 wacke of Devon. Rep. Brit. Assoc. 1837, Sect. p. 94. 



6. On the Geological Horizon of the Rocks of South Devon and Corn- 

 wall. Rep. Brit. Assoc. 1839, Sect. p. 68. 



7. On the Classification of certain Geological Formations in Devon- 

 shire. Phil. Mag. ser. 3, XIV. p. 358. 



8. On the Geological Position of the Culm- and Plant-bearing Beds of 

 Devon and Cornwall. Phil. Mag. ser. 3, XV. p. 293. 



9. On as much of the Transition or Grauwacke System as is exposed 

 in the counties of Somerset, Devon and Cornwall. Proc. Geol. Soc. 

 III. pp. 115, 158 Phil. Mag. ser. 3, XV. p. 396 ; XVII. p. 71. 



10. On the Geology of Devon and Cornwall. Phil. Mag. ser. 3, XVI. 

 p. 59. 



11. On the Discovery of a mass of Trap-Rock in the Mountain Lime- 

 stone of Bleadon Hill, in the county of Somerset, Trans. Geol. Soc. 

 ser. 2, VI. p. 561 Proc. Geol. Soc. III. p. 313. Phil. Mag. ser. 3, 

 XVIII. p. 522. 



12. On the older Strata of Devonshire. Rep. Brit. Assoc. 1840, Sect. 

 p. 103. 



13. On the Stratified and Unstratified Volcanic Products in the neigh- 

 bourhood of Plymouth. Rep. Brit. Assoc. 1841, Sect. p. 61. 



14. On the Stratified and Unstratified Volcanic Products of the West 

 of England. Rep. Brit. Assoc. 1842, Sect. p. 54. 



15. On the Discovery of the Remains of Fishes at the base of the 

 Mountain Limestone in the vicinity of Bristol. Rep. Brit. Assoc. 

 1842, Sect. p. 60. 



16. Plausible Reasons and positive Proofs, showing that no portion of 

 the Devonian System can be of the age of the Old Red Sandstone. 

 Phil. Mag. ser. 3, XX. p. 117. 



