46 BOTANICAL GAZETTE [JULY 
Mr. Edmund Heller made some explorations and zoological collec- 
tions for the Field Columbian Museum, February-December 1902, 
in which the western slopes of the Santa Catalina, San Pedro Martir, 
or Calamuie Mountains and of the Hanson Laguna Mountains were 
traversed. Mr. Heller crossed the main divide in about latitude 
31° 30’, south of the main elevation of Calamahuie, to Parral, which 
lies about 600™ above sea level. One degree to the northward the 
main range was again crossed at San Matias Pass and his expedition 
reached the bay of San Felipe. The account of this work contains 
notes on the occurrence of many important plants, including the giant 
cactus and the Washington palm.° 
The author organized an expedition to this region early in the 
present year, under the joint auspices of the Desert Botanical Lab- 
oratory of the Carnegie Institution, and of the New York Botanical 
Garden. In accordance with plans made a year previously, Mr. G. 
Sykes, civil engineer, of Flagstaff, Arizona, proceeded to Yuma in 
November 1903, where the construction of a small sloop, 9™ in 
length with 2.4" beam, was begun and which was brought to com- 
pletion late in January 1904. This boat was of a flat-bottomed 
design suitable for floating down the muddy shallows of the river, 
and was furnished with a centerboard for use in sailing the rougher 
waters of the Gulf, being rigged with a mainsail and jib. : 
In addition to the camp equipment, which included means for 
storing and carrying. fresh water, and a special form of portable 
canteen, provisions, compasses, binoculars, cameras, aneroids, ther- 
mometers, hygrometers, and other material to a total weight of about 
500 was taken aboard. The party included Prof. R. H. Forbes, 
Director of the Agricultural Experiment Stations of Arizona, and 
an assistant, in addition to Mr. Sykes and the author. A general 
narrative in which the detailed movements of the expedition are 
given has already been published’ and need not receive further atten- 
tion in this article. ; 
6 Exuior, D. G., A list of mammals collected by Edmund Heller in the San Pedro 
Martir and Hanson Laguna Mountains and the accompanying coast regions of Lower _ 
California. Field Columbian Museum, Publ. 79. Zoological Series 3: no. 12. 1903. 
7 MacDoveat, D. T., Botanical explorations in the southwest. Jour. N. Y. 
Bot. Garden 5:89. 1904. 
