XXIII. 
z 3: 
a o 
a oe, 
Raia sai 
er, 7 
WA AANE EA 
ai, Mii Leb fg Hoth EM 
Basti tals ; Bi) 
i, À Giai 
if 
mart hes 
tn Sie 
ae 
i; 
Specimens from a cache found near Pierce's fill, Rock Oreek, D. ©. Porphyritic felsite. 
