346 JoURNAL OF CoMPARATIVE NEUROLOGY. 
KRIEGER | PRESENT PAPER 
Anterior Punktsubstance of the anterior swelling | Dorsal lobe 
Posterior Punktsubstance of the anterior swelling|Inferior dorsal lobe 
Punktsubstance of the antennulary nerve Antennulary lobe 
Punktsubstance of the tegumentary nerve Tegumentary lobe 
Punktsubstance of the antennary nerve Antennary lobe 
? Pyriform lobe 
Py Procerebral bridge 
c Central body 
Posterior Punktsubstance of the lateral swellings|Optic lobe 
Anterior Punktsubstance of the lateral swellings |Olfactory lobe 
Dorsal Lube. All that portion of the median fibrillar mass 
which lies above (dorsad of) the central body is called the 
dorsal lobe (fig. 1, D.L.). 
Inferior Dorsal Lobe. Immediately below (ventrad of) the 
central body there is another aggregation of fibrillar substance 
which is called the inferior dorsal lobe (fig. 1, /.D.Z.). There 
is no sharp morphological demarcation between the dorsal and 
inferior dorsal lobes and I believe that they are physiologically 
similar. 
Antennulary Lobe. This is an ellipsoidal lobe which lies 
just inside (mesad) of the inner dorsal edge of the optic lobe. 
It is so called because it is formed in a great measure, of fibers 
from the antennulary nerve (fig. 1, A.L.). 
Tegumentary Lobe. ‘This is a small, nearly spherical lobe, 
which is situated near the upper (dorsal) portion of the ventral 
nidus (fig. 1, Z.Z.). This bears the same relation to the tegu- 
mentary nerve that the antennulary lobe does to the antennu- 
lary nerve. 
Antennary Lobe. ‘This is a large ellipsoidal lobe lying in 
the ventral portion ofthe brain at the origin of the antennary 
nerve (fig. 1, Amt. L.). 
Pyriform Lobe. This is a small but conspicuous lobe situ- 
ated near the inner mushroom nidus (fig. 1, P.Z.). This is best 
studied in longitudinal sections where it is seen lying above and 
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