842 SEC. 16. GEOLOGY AND MINING. 



43. Coccolite with garnetite from the Escorial, formed of diopside and 



garnet. 



44. Coecolite from Riara (Segovia), formed of diopside, garnet, hematite, 



quartz with fluid cavities, and apatite.* 



45. Coccolite from Riarja (Segovia), formed of diopside and hematite. 



46. Coccolite with garnetite from Riarja, Segovia, formed of diopside and 



garnet. 



47. Garnetite from Riarja (Segovia), formed of garnet and diopside. 



48. Hyalomicte from Riarja (Segovia), formed of quartz and muscovite. 



49. Ophite from Puerto Real, Cadiz, formed of plagioclase, augite, diallage, 



epidote, hornblende, magnetite.f 



50. Ophite from Puerto Real (Cadiz) formed of felspar, hornblende, 



magnetite. 



51. Diabase from the Sierra de Cordova, formed of plagioclase, chlorite, 



augite, magnetite. 



52. Garnetiferous amphibolite from Pedraya de la Sierra (Segovia), formed of 

 <j amphibole and garnet. 



53. Garnetiferous amphibolite from Pedraya de la Sierra, composed of 

 i>u : j.'u amphibole and quartz with fluid cavities. 



54. Quartziferous amphibolite from the escorial, formed of amphibole and 



quartz. 



55. Quartziferous amphibolite from Dilar (Granada), formed of amphibole 

 .<*}-. and quartz. 



56. Garnetic quartziferous amphibolite from Toril de Dilay (Granada), 



formed of amphibole, quartz, garnet, and picotite. 



57. Quartziferous amphibolite from Laguna de Bacares (Granada), formed 



of amphibole, quartz, and picotite. 



58. Quartziferous amphibolite from Barranco de les Araligos (Granada), 



formed of hornblende and -quartz. 



59. Quartziferous amphibolite from Barrauco de los Araligos (Granada), 



formed of hornblende and quartz. 



60. Quartziferous amphibolite from Barranco de los Araligos (Granada), 



formed of hornblende, quartz, garnet, and hematite. 



61. Quartzdiorite from Almadeii, formed of plagioclase, hornblende, 



magnetite, quartz, with apatite. 



62. Quartzdiorite from Almaden, insoluble from the action of acids. 



63. Diorite from Peguerinos (Avila), formed of plagioclase, hornblende.J 



64. Idem from Peguerinos (Avila), formed of plagioclase, hornblende. 



65. Idem from Peguerinos (Avila), formed of , plagioclase, hornblende, 



magnetite, augite. 



66. Idem from Peguerinos (Avila), formed of plagioclase, hornblende, 



magnetite, viridite, calcite, and quartz. 



67. Diorite from Peguerinos (Avila), formed of plagioclase, hornblende, 



magnetite, viridite, and augite. 



68. Trachyte from Cartagena, formed of sanidin, hornblende, magnetite. 



69. Trachyte from Telde (Grau Canaria), formed of sanidin, magnetite. 



70. Trachyte from Guia (Grau Canaria), vide No. 8 of the collection of 



Grau Canaria Rocks, by M. S. Calderon, formed of sanidin, magne- 

 tite, hornblende. 



* Observaciones sobre algunas rocas de Riarja (Segovia), by Quiroga. An. de la Soc. 

 Esp. de Hist. Natural, J. v, .. 10H . , 



t Bosquijo geologico de la provincia de Cadiz, por T. Macpherson. Cadiz, 1872, and 

 An. de la Soc. Esp. de Hist. Nat., J. v. 



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

 Paper read by F. Quiroga. 



Resiiia de las rocas de la Isla Volcanica Grau Canaria, por Salvador Calderon. An. 

 Soc. Esp. de Hist. Natural, J. iv. 



