118 
74. Fine grained granite in veins from the same hill, intersecting the former 
rock. 
75. Greenstone from the same, resembling basalt, and 'taken from near the 
veins. 
76. Greenstone with veins of tremolite, from the hill of Santa Teresa or Huax- 
toco. 
77. a Greenstone from the hill near to the Hacienda de Santa Teresa, inter¬ 
sected by veins of the granite b. 
78. Conglomerate of fragments of greenstone from the brow of the Umalalang. 
79. Argillaceous conglomerate, from the foot of the southern slope of the Ma- 
loxuet. 
80. Prase, found under the slate in the same hill. 
81. Grey-wacke, from the small hill of Umalpotate at the foot of the former. 
SIERRA DEL MORRO, AND HILLS NEAR TEHUANTEPEC, 
HUILOTEPEC, AND SAN FRANCISCO. 
82. a, Ancient porphyry, with veins b of red iron and hidrate of iron, from the 
Cerro de la Cueva. 
83. a and b, The same porphyry also, with veins from the Cerro del Morro. 
84. Dioritic porphyry, intersected by veins of sienite 6, from the Cerro del Tigre 
or Daniguibedchi. 
85. Finely-grained sienite, from the hills of San Diego. 
86. Sienite and another rock, composed of quartz and albite, from the Huilote- 
pec or Daniguibixo. 
87. Graphic'granite of the hills of Huazontlan. 
88. Veins of Porphyry, altered by the fire of the hills of the Morro. 
89. a, Dioritic porphyry of the Baxmumbah ; b, granite from a fragment which 
intersects and partly covers the dioritic porphyry; c, new granite in veins 
which intersect the two pervious rocks. 
90. Granite and sienite from the Malnagirastiac- 
