Johnston, Fon^hrntn Vesicle in Vertebrates. 527 



olfactoria which Ediiigvr used earlier (ISUG, p. 141). The present 

 vise of lobiis parolfactoriiis is likely to lead to confusion with the 

 area parolfactoria Brocw nsed by the BjS'A, which is only a specific 

 part of the whole group of secondary olfactory centers. Edinger 

 uses the term area parolfactoria in the BNA sense in Figs. 2-17, 275, 

 279, which are old figures reproduced in this edition without revision. 

 This disregard by Edinger of the usage of the majority of other 

 authors is responsible largely for confusion which arises in the work 

 of younger authors or those who are not thoroughly familiar with 

 the internal structure of the brain. Eor example, Fuchs (1908) 

 calls the bulbar formation in the frog larva ''lobus olfactorius" and 

 applies the term ''hemisphere" to the rest of the telencephalon. The 

 confusion of other authors who attempt to follow Edinger's work- 

 would be less if Edinger himself always used his terms in the same 

 sense. On p. 260 of the same book he uses the term lobus parolfac- 

 torius as synonymous with tuberculum olfactorium at least in rep- 

 tiles, birds and mammals. This center, Edinger thinks, is a special 

 center for the oral sen^e, an interpretation which G. Elliot Smith 

 (1909) shows to be wholly improbable. To the secondary olfactory 

 center which covers the lateral and ventral surface of the striatum 

 Edinger gives the names lobus olfactorius (Figs. 230, 231, 234). 

 area olfactoria (Figs. 247, 273, 274), cortex olfactorius (Figs. 

 240, 265, 280), and nucleus taniffi (Fig. 239). 



Professor C. J. Herrick in the course of a very valuable paper 

 on the subdivision of the brain (1908) gives expression to the cur- 

 rent idea of the telencephalon in the following sentences. ''The 

 telencephalon is well named. It is terminal, not only in position but 

 also in point of time, having been added relatively late in the 

 phylogeny to the rostral end of the original neural tube. The BI^TA 

 has done well to omit from it the pars optica hypothalami which was 

 originally tabulated as part of this region by Professor His. Origi- 

 nally developed as primary and secondary olfactory centers, it has 

 added successively more and more complexity during the whole 

 course of phylogenetic history." I quote this not for the sake of 

 criticising Herrick's work — for the whole spirit of his paper and 

 most of the details of it are in perfect harmony with my own views — 



