ii6 Journal of Comparative Neurology. 



logical relations of the cornu ammonis. He shows clearly that 

 the knowledge of this region is still liniited and that we are not 

 justified in making too many assertions before the method of 

 Golgi has satisfactorily shown the histological connections of all 

 the various elements. After the cornu ammonis, Honegger 

 treats the following parts : stria Lancisii ; psalterium, fornix 

 longus and fimbria ; septum pellucidum and pedunculus septi 

 pellucidi ; columnae fornicis ; tuber cinereum and corpus mamil- 

 lare ; decussatio subthalamica posterior and pedunculus corporis 

 mamillaris; Vicq d' Azyr's and Gudden's bundles; fasciculus 

 longitudinalis posterior; tsenia thalami optici ; ganglion hab- 

 enulae, pedunculi conarii ; Meynert's bundle, taenia semicircu- 

 laris, nucleus amygdalae. As I hope to enter very fully on 

 Honegger's work in a future paper, I give merely these out- 

 lines here. 



The results of Honegger's very intricate studies are rather 

 unsatisfactory, inasmuch as they are to a great extent negative, 

 telling us that we have no right to use many dogmatic views of 

 authorities before they have found fuller proof A comparison 

 with Alexander Hill's speculative method shows, however, the 

 value of such "negative" and critical work and numerous re- 

 marks, especially those relating to the anatomy of lower verte- 

 brates, make us feel hopeful that the strictly objective study 

 will finally triumph over apparently ingenious but often badly 

 founded speculations. 



Honegger's collection is worth seeing because it contains 

 the finest carmine and gold series, such as are becoming very 

 rare since the carmine of today is so bad that haematoxylin 

 governs the field entirely. 



Prof. Paul Martin, whose paper on the embryology of the 

 cranial nerves^ is not accessible to us, cannot devote as much 

 time to neurology as the above mentioned scholars. His col- 

 lection, however, is very interesting on account of the fine Gol- 

 gi preparations and the embryological material. There is no 



1 Martin, P. Die erste Entwickelung der Kopfnerven bei der Katze. es- 

 ter. Mon. Schr. f. Thierheilkunde. 15. Jahrgang; Sept., 1890/ 



