446 PROF. G. ELLIOT SMITH ON 
from the neopalliam, the latter moiety constituting the corpus 
callosum. 
On the mesial surface of the hemisphere of Macroscelides 
there is a most extraordinary condition (fig. 2). 
Macroscelides proboscideus: vight cerebral hemisphere, 
mesial aspect, Xx 6. 
¢.@., commissura anterior. ¢.¢., corpus callosum. /., fimbria. /j.d., fascia 
dentata. fH, fissura hippocampi. /.i., hippocampus inversus. ps., psalterium. 
s.i., septum lucidum. v.h., vestigia hippocampi. y., area of subsplenial 
hippocampal flexure. ., line of probable connection between the psalterium 
and splenium. Other references as for figure 1. 
In the lamina terminalis there is a relatively (¢. e. in com- 
parison with that of Marsupials) small anterior commissure (¢.a.), 
and yet, above it, a typically metatheroid psalterrum (fornix- 
commissure, ps.) of a erescentic shape such as occurs in 
Perameles, Notoryctes, Didelphys, 2nd Myrmecobius. The hippo- 
campal formation (fig. 2, fascia dentata) extends forward on to 
