Volume 31(2)

Journal
of the
Arizona-Nevada Academy of Science

CONTENTS

Gammarus lacustris Sars (Crustacea: Amphipoda) in the tailwater
    of a regulated river.
    Andrew D. Ayers 		83
Successful cloning of the Saguaro (Carnegiea gigantea, Cactaceae).
    William P. Baker and Louis Eduardo Marin 		97
Recent observations on the ecology and distribution of Argemone arizonica
    Ownbey (Papaveraceae).
    Nancy J. Brian 		101
Vegetation changes at Bingham Cienega, the San Pedro River Valley, Pima
    County, Arizona, since 1879.
    Julia Fonseca 		103
Relating micrometer-scale weathering to landform morphology at Papago Park,
    Phoenix, Arizona.
    Jennifer Mills 		117
Contrereas-Balderas A Garcia-Salas J.A Maria Josia The avifauna of Anhuac,
    Northern Nuevo Leon Mexico.
    José I. Gonzales-Rojas, Armando J. Contreras-Balderas,
    Juan A. Garcia-Salas, and José María 		127
Book Reviewes
    The Birds of Sonora
    A Place Called Grand Canyon - Contested Geographies
    William H. Emory: Soldier-Scientist
 		100
137
139
List of Reviewers 142

1998
Published by the
Arizona-Nevada Academy of Science