AUTHOR’S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, JUNE 27 
THE CONNECTIONS OF THE VOMERONASAL NERVE, 
ACCESSORY OLFACTORY BULB AND AMYGDALA 
; IN AMPHIBIA 
C. JUDSON HERRICK 
Anatomical Laboratory, The University of Chicago 
THIRTY-SEVEN FIGURES 
CONTENTS 
Heep TOUN CHLOE Ake. 5 Serra Lanh AAMT eet OSE Ne oat ad che ae aya Me RTEN tae olet 213 
GLUT AS erties cer tal EAC ese peel eine miele crap ers 1g MO TENS Ra ound as ow emg 916% 217 
HME: Cl tate A eee er pe ive, Bass arsine A cers eta eyahe moda aheud wi HS sgiehs im Sig Elece 238 
IV. Morphogenesis of the urodele strio-amygdaloid complex............... 255 
V. The comparative anatomy of the strio-amygdaloid complex.......... 263 
VERE Str ATV Se TT PERE. cots nisl. Naa Sahat CRIS Soeid See OR awa s ae Etieoehie 276 
I. INTRODUCTION 
It has long been known that in various mammals, reptiles, 
and amphibians the olfactory bulb is divided into two parts or 
lobules, of which the smaller, usually called the accessory bulb, 
occupies various positions, generally near the caudal border of 
the main bulb. It was early recognized by a few students of 
of this region that the accessory bulb is related by a special 
strand of nerve fibers with the vomeronasal organ (Jacobson’s 
organ) of the nose; and this morphological relationship has more 
recently been emphasized by McCotter (12). In 1917 McCotter 
extended his previous observations on the mammals to include 
the turtle and the frog. 
From all of these studies it is clear that the neuro-epithelium 
of the vomeronasal organ is similar in character to that of the 
remainder of the olfactory mucosa; that from it there arises in 
amniote vertebrates a special nerve, the vomeronasal nerve, 
which is morphologically and probably physiologically a special- 
ized part of the olfactory nerve, and that the vomeronasal nerve 
terminates in a differentiated portion of the olfactory bulb, the 
213 
