BRAIN AND CRANIAL NERVES OF BDELLOSTOMA DOMBEYI. 137 
The Descriptive Anatomy of the Brain and 
Cranial Nerves of Bdellostoma Dombeyi. 
By 
Julia Worthington, 
Walnut Hills, Cincinnati, Ohio. 
With Plates 8, 9, 10 and 11. 
TABLE OF CONTENTS. 
I. InrRopucTIon: 
a. Position of Bdellostoma in the vertebrate series 
b. Advantages of a study of its brain 
Il. Tue Cranium AND CraniAL MEMBRANES 
Il. Tue Bray: 
a. General appearance, measurements, etc. 
6. Olfactory lobes 
c. Fore brain 
d. ’Tween brain . 
Habenular ganglia 
Hypophysis and saccus vasculosus 
Ventricles of "ween brain 
e. Mid brain 
f. Cerebellum . : : ; 
g. Medulla : ‘ ‘ : 
IV. THe Crantat Nerves: 
a. Their number and relative importance 
Olfactorius 
Opticus 
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