Abstracted by Nils Holmgren, author 
University, Stockholm, Sweden. 
Points of view concerning forebrain morphology in 
lower vertebrates. 
This paper contains an attempt to show that the pallium of 
practically all vertebrates is divided into three parts, known from 
reptiles and mammals as hippocampal, general pallial, and 
pyriform cortex. This opinion is founded especially on the con- 
ditions in embryonic shark brains. This same subdivision is also 
demonstrated in ganoids and bony fishes, where the so-called 
striatum is shown to contain these same parts. The everted 
forebrain of bony fishes is explained as resulting from a preceding 
phylogenetic inverted and evaginated stage. Also to the sub- 
pallial parts author has paid attention and attempted to establish 
the homologies through the series of lower vertebrates. The 
paper ends with a part treating with the forebrain phylogeny in 
the light of paleontology. The paper deals in more detail with 
the forebrains of Petromyzon, Acanthias, Chimera, Protopterus, 
Polypterus, Lepidosteus, Amia, Acipenser, and Teleosts. 
