‘iia August 18th up to the 14th October, all the collectiite 
were made in New Mexico, in the valley of the Del Norte, or on 
the table lands adjacent, and between Santa Fé and the 33d par- 
~ “allel of latitude, (230 miles below Santa Fé.) 
From the 14th October to the 19th, we were crossing the great 
aoe ridge between the waters of "the Del Norte and the waters 
he Gila, nearly on the 33d parallel of north latitude, and be- 
ia the 107th and 109th meridians of longitude, measured from 
Greenwich. The greatest height of this dividing ridge along our 
trail was about 6,000 feet above the sea. . 
From the 19th of October to the 22d November, we were follow- 
ing the course of the Gila river, occasionally forced into the moun- 
‘tains to avoid the cafions. This route is never far from the 33d 
parallel of latitude, and is embraced between the 109° and 114° 30’ 
meridians of longitude, falling, during that Sea NC es very uniformly 
from about 5,000 feet to near the level of the sea 
_ From the 22d November to the 24th, we were on the Colorado of 
the west, traversing a low sandy bottom 
From the 24th November to the 28th, 1 we were ait the great 
desert of drifiing sand in a course little north of w 
‘On the 28th November, we encamped at the Caine ‘(Reed) creek, 
or spring, the waters of which, when first exposed, are warm, and 
emit the smell of a sulphuretted hydrogen , 
From the 28th November, we commenced® to ascend thé Cordil- 
_ leras of California, (the continuation of which forms the peninsula 
. of Lower California, and reached the highest point of the route 
, December 5th, 3 000 feet above the sea, and as many below the 
overhanging peaks. From that point we descended to San Diego, 
_ a seaport on the level of the sea, in latitude 32° 45’ and longitude 
170° 11' west of Greenwich. This point we reached December 12. 
‘With great respect, very truly yours, 
re W. H. EMORY. 
_. Professor Torrey, Princeton. 
RANUNCULACE. af 
Miecacilus aquatilis, Linn. ‘Plains of the Arkansas. 
_ . Clematis Virginiana, Linn. Raton mountain. An undetermined 
: “species of this genus was found in fruit, November 10th, on the . 
Gila. The plumose tails of the carpels are nearly three inches 
jong. 
a BERBERIDACE®. 
: _Berberis pinnata, Lagasca. Higlands bordering the Gila. This’ 
appears to be a common species in the southern pend of EPPS! Cali- 
boa and in Northern Mexico. : 
CRUCIFER&. 
‘ruderale, Linn. a of the Arkansas. 
Arkansanum, J Nutt, Tribt taries _< of the Copadi 
