544. GEOFFREY SMITH. 
Where they enter the brain there is a dorsal ganglionic mass 
(text-fig. 46, g. A.). The dorsal ganglionic masses (g. C.) 
belonging to the antennary nerves are applied anteriorly to the 
ventral root of the optic nerve, and it is possible that this part 
of the ganglionic mass (g. C.) really belongs to the optic nerve. 
If this were so, the optic nerve would be supplied with a dorsal 
TpxT-FIG. 46. 
Reconstruction of brain of Anaspides tasmanie. Ant. 1. 
Antennulary nerve. Ant. 2. Antennary nerve. Opt. Optic 
nerve. g.A. Dorsal ganglionic mass applied to root of optic 
nerve. g.F’. Its posterior continuation. g.B. Ganglion applied 
to root of Ant. 1. g.C. Ganglion applied dorsally to root of 
Ant. 2. g.D. Ganglion applied ventrally to root of Ant. 1. 
g.H. Ganglion applied ventrally to root of Ant. 2. Com. Peri- 
cesophageal commissures. sub. gn. Subcesophageal ganglion. 
and ventral ganglionic mass, as in the case of a regular 
trunk nerve. Lying dorsally in the brain there is a bundle 
of transverse commissural fibres forming a regular optic 
chiasma. 
‘The antennulary nerves (Ant. 1) enter the brain ventrally 
