CONTENTS 
The Endosperm of Utricularia 
Rosert B. Wyiir and AuicE E. Yocom 
The Amphibians and Reptiles of Dickinson 
County, Towa FRANK N. BLANCHARD 
The Learning of a Simple Maze by the Larva of 
Ambystoma Tigrinum (Green) ALBERT KUNTZ 
Melamorphic Changes in the Digestive System in 
Rana Pipiens and Ambystoma Tigrinum ALBERT KUNTZ 
The Feeding Reactions of Ambystoma Tigrinum 
(Green) ALBERT Kuntz and JosE Zozaya 
Responses of the De-eyed Larvae of Ambystoma 
Tigrinum (Green) to Solid Bodies 
ALBERT KuNTzZ and Jose ZozZAYA 
Nest Digging and Egg Laying Habits of 
Bell’s Turtle FRANK A. STROMSTEN 
