Geology and Mineralogy. 71 
n 
at the newly discovered washings of Salobro or Canaviciras, near 
the mouth of the Jequelinhouha in southern Bahia, Professor 
Gorceix notes the absence of th ides of titanium (rutile and 
octahedrite), of the hydrous phosphates of alumina and cerium, 
and of tourmaline, so characteristic of the diamond sands of 
Diamantina, Bagagens, and of the diamond region of Bahia. 
rarely in a single locality in the Diamantina district. 
Prof. Gorceix has also studied the favas (Lima beans) of the 
Diamantina and western Minas Geraes. These are discoi pe 
bles resembling in shape the seed from which they take their 
name, which decrepitate and give much water in the closed tube. 
Three series are recognized, two of which contain silica, alumina 
and a small proportion of phosphoric acid. The other mo 
interesting series, of which the analysis has not yet been com- 
leted, contain titan i i me 
No. 1. BO. 3 
SOG a ATS 46°9 
Al,Os 20°6 21°5 
Fe.0; I'l 
Cad 76 7-0 
MgO 31 3 
KO 44 4°6 
NaO 0s 6 
HO, 15°0 15°0 
100°1 101°3 
—Annals du Escola de Minas de Ouro Preto, vol. iii. 
17. Spodumene erystals of gigantic size; ‘ 
mine in Pennington County, Dakota, have exposed numerous 
Crystals of spodumene of unusually large dimensions. One erys- 
tal which extends horizontally parallel with a drift is thirty-six 
feet in length in a straight line, and is from one to three feet in 
Shickness, It penetrates massive quartz and feldspar. The 
e 
fom} 
Planes are obscure. Crystals from five to twenty fect long are 
