146 Natural History of the Farallones. [ZOE 
fissures partly filled with a granitic conglomerate. Whether these 
fissures are natural, or were worn by the water, I was unable to de- 
termine. I also saw fragments of jasper and other rocks besides 
granite scattered about among the debris. 
Mr. J. de la C. Posada informs me that about Carmel Bay, near 
Monterey, there are sea terraces at levels corresponding closely with 
those of the Farallones, and that a higher terrace is faintly outlined 
about 80 feet above the sea. This I may have overlooked at the Far- 
allones. He found a conglomerate resting unconformably upon the 
granite and formed of materials eroded from it. This conglomer- 
ate.is inclined at an angle of about 45°. I thought I could distin- 
guish a marked dip toward the north in the conglomerate of Sugar 
Loaf Rock, but I was unable to make a close examination, owing to 
its separation from the island by a narrow channel, and to the 
roughness of the sea. The sandstone at Point Reyes Light ap- 
pears to dip toward the south. 
BOTANY. 
The season was too far advanced for a good collection. Many 
species were already dead, and only dry fragments could be obtained. 
It is probable that a collection in May would add several more. 
species to the list. Most of the plants here enumerated were doubt- 
less brought over with the hay and other supplies, while those not 
thus introduced are given as ‘‘ native.” Eight species were found 
only in a small garden plot, protected from the rabbits, and else- 
where would be speedily exterminated. A single fresh-water alga 
~ sey but not collected. There are no trees or shrubs on the 
island. 
The soil is composed of decomposed granite and guano. Springs | 
are few and small. Beria maritima and Lepigonum macrothecum 
_ are the chief food of the rabbits; at this time of the year there 
was little except the latter to maintain them, and many were dying 
of starvation. 
Only one plant—Zeria maritima—has b 
lon Weed.” It grows abundantly earlier in the season, 
reach a length of two to four feet. [t furnishes excellent 
and is highly esteemed as “ greens ”’ by the inhabitants. 
