738 ON THE VOLCANO OP TAAL, 



51. Oolitic volcanic tufa. Ditto. 



52. Volcanic sandstone. Ditto. 



53. Basaltic scoriae. Ditto. 



54. Basalt somewhat scoriaceous. Ditto. 



55. Very recent tufa. Escarpments of Point Cayasa* 



56. Volcanic grits. Between Points Baloc-baloc and Bignay. 



57. Doleritic lava. Barranco between Mata-na-Golod and 

 Ragatan about the mai'gin. 



58. Scoriaceous tufa of grey and red color. Islands northeast 

 of the volcano. 



59. Volcanic tufa. Ditto. 



60. Compact bed of scoriaceous ashes. Islet of Bignay, north 

 of the island Bubiun. 



61. Volcanic tufa. Bubiun. 



62. Basalt. Ditto. 



63. Basalt somewhat scoriaceous. Ditto. 



64. Basalt. Napa}'ong Island. 



65. Trachyte with streaks of basalt. Ditto. 



66. Laterite. Ditto. 



67. Very compact volcanic tufa. Ditto. 



68. Trachy-dolerite. Mt. Sungay, Pico Gonzalez. 



69. Compact volcanic tufa. Ditto. 



70. Retinite. Mount Sungay, Barranco adjoining Talisay. 



71. Trachyte. Ditto. 



72. Porphyritic trachyte. Mount Sungay, Banga barranco. 



73. Laterite. Mount Sungay, Calocan Village, Escarpment of 

 Balicbiring. 



74. Dolerite. Point Lipa and Mount Macolod. 



75. Dolerite, partly decomposed. Mt. Macolod. 



*I found in this deposit some small fragments of the common freshwater 

 shells of the lake (Corbicula crosseana, Fisher). 



