I. GEOLOGY. 841 



9. Dimyte from the Serrania de Honda, formed of peridot picotite.* 



10. Dimyte from the Serrania de Ronda, formed of peridot, picotite.* 



1 1 . Chrysolite from the Serrania de Ronda, formed of peridot, diopside.* 



12. Serpentine from Sierra Parda (Serrania de Ronda), formed of peridot, 



serpentine, hematite.* 



13. Serpentine from Sierra Parda (Serrania de Ronda), formed of serpen- 



tine, peridot, magnetite, hematite.* 



14. Serpentine from Istau (Serrania de Ronda), formed of serpentine and 



magnetite. 



15. Serpentine from Ystau (Serrania de Ronda), formed of serpentine and 



magnetite. 



16. 17. Serpentine from Real del Dugue (Serrania de Ronda), formed of 



serpentine and magnetite. 



18. Serpentine from Ronda, formed of serpentine and magnetite. 



19. Serpentine from Torrevieja (Alicante), formed of serpentine and 



magnetite. 



20-22. Serpentine from Barranco de San Juan (Granada), formed of ser- 

 pentine and magnetite. 



23. Serpentine from the Sierra of Guejar (Granada), formed of serpentine 



and magnetite. 



24. Chlorite state of Cogulludo, formed of chlorite and magnetite. 



25. Anthrakonite from Galicia, formed of fetid calcite. 



26. Nummulitic limestone from San Vicento de la Barguera (Santander). 



27. Cipolin from Robledo de Chavela (Madrid), formed of calcite and 



muscovite. 



28. Chloritic limestone from Almaden, formed of calcite chlorite. 



29. Obdurate clay of Segovia (cretaceous period), formed of clay, quartz.f 



30. Clay slate of Pena de Penilla (silurian age), Segovia, formed of clay, 



feldspar, and quartz. 



31. Talcose slate of the Escorial, formed of talc, quartz, and muscovite. 



32. Felsyte from the Barranco del Cebollon, Granada, formed of felsyte, 



quartz, amphibole. 



33. 34. Felsyte from the Escorial, formed of felsyte alone. 



35. Felsyte from Peguerinos (Avila) formed of felsyte, quartz.^ 



36. Granite from Robledo de Chavila (Madrid), formed of orthoclase, 



quartz, muscovite, and hornblende. 



S" 7 . Gneiss from Chapas de Marbella (Serrania de Ronda), formed of 

 orthoclase, quartz, muscovite, apatite. 



38. Gneiss from Mijas (Serrania de Ronda), formed of orthoclase, quartz, 



and muscovite. 



39. Garnetiferous gneiss from Huertal (Granada), formed of orthoclase, 



quartz , muscovite, garnet, and picotite. 



40. Gneiss from Robledo de Chavila (Madrid), formed of orthoclase, quartz, 



muscovite, and hornblende. 



41. Gneiss from the Escorial, formed of muscovite and quartz and ortho- 



clase. 



42. Micaceous gneiss from the Escorial, formed of muscovite and quartz. 



* Brevis apuntis auria del origen peridotico de la serpentina de la Sen-atria de Ronda, 

 by Don T. Macpherson. Anales de la Sociedad Espanola de Historia Natural, J. iv. 



t Excursion geologica por la provincia de Segovia, por Don Alfonso de Aristo y Sarri- 

 naga y Don Francisco Quiroga y Rodriguer. Ariales de la Socd. Espanola de Hist. 

 Natural, J. iii. 



% Anales de la Soc. Esp. de Hist. Nat. J. iv. Actas, p. 73, sesion del 1 de Setz. de 1875. 

 Paper read by P. Quiroga. 



. See (*), Memoria lObre la estructura de la Serrania de Ronda, by T. Macpherson. 

 Cadiz, 1874. 



