142 



THE GEOLOGIST. 



ZooPHYTA (Hydroida) ? 



Didymograpsns oaduceus, Salter, G, J. 

 ix. 87. 

 geminus, His., Leth. 

 S. 5. 



sextans, Hall, P. N. Y. 

 t. 74. 



Murchisonii, BecJc, S S 

 695. 



Diplograpsus bullatus, Salt, G. J. vii. 

 174. 



foliaceus, Murch., G. J. 



vii. 64 

 folium, His., G. J. vii. 63. 

 mucronatus, HaU, P. N. 



Y. t. 73. 

 nodosus, Harkn, G. J. 



vii. 62 



pennafcus, Harhn, G. J. 



vii. 62. 

 ramosus, Hall, sp. P. N. 



Y. t. 73. 

 rectangularis, M'Coy, P. 



F. 8. 



pristis, His., Leth. S. t. 85. 

 teretiusculus, His. sp., 

 Leth. S. t. 38. 



Graptolithus oonvolutus, His. sp. Leth. 



S. t. 35. 

 Conybeari, Portl. G. J. 



viii. 391. 1 

 Griestoneusis, iVzcoZ., G J. 



vi. 63. 

 latus, irCjy., P.'^F. 4. 

 lobiferus, M'Coi/!', P. F. 4. 

 Nicoli, Harkn., G. J. vii. 



61. 



Nilssoni, j5arr., G. J. vii. 

 61. 



priodon, (O. Ludensis) 

 Bronn. sp., Leth. t. 1. f. 

 13. 



Sagittarius, Linn., G. J. 



viii. 390. 

 Sedgwickii, Portl, Geo. 



Rep. 318. 

 tenuis, Portl, Geo. Rep. 



319. 



Rastrites peregrinus, Barr., G. J. vii 

 69. 



{To he continued.) 



THE SPIBIT OF GOOD BOOKS. 



NOTICES OF THE YOLCANIC EOCKS AND GEYSIES OE 



ICELAND. 



EXTEACTED FBOM LOED DuFFEKIN's " LeTTEES FEOM HiGH LATITUDES." 



By the Rev. J. E. Yactx, A.M. 

 Oe all the wondrous changes which nature has wrought on the earth's 

 crust, there is scarcely anything that will bear comparison with those 

 which meet the eye of the traveller in volcanic regions. Of the two 

 great agents in Geological transformation- water and fire, the one 

 moves us with admiration at the delicacy of its operations, the other 

 strikes us with awe at the mightiness of its influences, and the rapidity 

 01 its work. 



