Meyer, Nmivlogists and Nciuvlogical Laboratories. 3 



radiation, but have a longitudinal course in the posterior part of 

 the optic thalamus, which is itself covered posteriosly by the 

 large external geniculate body. The difference in the form of 

 the laminae medullares is explained in a simular way. The 

 fornix, before it ends in the corpus mammillare, sends fibres 

 into the pedunculus glandulae pinealis. The part of the fornix 

 situated above the thalamus opticus (corpus fornicis) becomes 

 thicker than the corpus callosum in lower mammals, be- 

 cause the commissural fibres corresponding to the Lyra Davidis 

 in man are much more numerous, in proportion to the greater 

 area of the origin of the fornix in these animals. 



The latter part of the paper is very often quoted. I can 

 not help thinking however that many of those who quoted it did 

 not know it but from quotations; a perusal of the paper would 

 have made many mistakes evitable. 



In 1874 Forel's splendid work on the ants of Switzerland^ 

 appeared, a wonderful testimony of his talent of observation and 

 of classification, and this was followed by a number of myrme- 

 cological studies.'-^ In the same time he worked out the classical 

 paper on the anatomy of the tegmentum and its connections with 

 the cephalad portions of the brain.-' There is no doubt that v. 

 Gudden who was psychiatrist at Zurich when Forel was a student 

 made a deep impression on on him. Huguenin was at that time 

 working in Meynert's sense and ways and published his 

 anatomy of the brain 1873.* Forel too become a pupil of 

 Meynert, but his independent mind, trained so well by his ento- 

 mological studies, led him another way. Whereas Huguenin 

 furnished a translation of Meynert's work into intelligible Ger- 



1. Les fourmis de la Suisse : Nouveaux memoires de la Societe helvetique 

 des sciences naturelles, 1874. 



2. Etudes myrmecologigues, Bull. Soc. vaud. sc. nat. xvi, 81 etc. 



3. Untersuchungen iiber die Haubenregion und ihre oberen Verkniipfun- 

 gen im Gehirne des Menschen und einiger Saugethiere, mit Beitragen zu den 

 Methoden der Gehirnuntersuchung. Von Dr. August Forel, Assistentarzt an 

 der Kreis Irrenanstalt Miinchen. Arch. f. Psychiatric, Bd. vii. 1877. 



4. Allgemeine Pathologic der krankheiten des Nervensysteins. i. Theil. 

 Amatomische Einleitung. Zurich, 1873. 



