38 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 63 



for the trip. This expedition formed a part of the lar£j;er scheme of 

 studying in the field the desert plants of both North and South Amer- 

 ica, which had been organized by Dr. N. L. Britton, Director of the 

 New York Botanical (iarden, and Doctor Rose, in connection 



Fic. 40. — A CtTcus (C. Icpidotits Salm-Dyck) common on these islands. Near 

 St. John's, Antigua. Photograph by Russell. 



with their Cactus Investigation for the Carnegie Institution of 

 Washington. Doctor Britton also took a party to the West Indies. 

 Both parties started from New York City January 25. Doctor 

 liritton and his assistants explored St. Thomas, St. jan and others 

 of the Virgin Islands, Porto Rico, and Curacao. His collection con- 

 sisted of more than 3,000 species, comprising two sets, one of which 

 has been sent to the National Museum as an exchange. 



