Explanation of Plates. 



Plates XIII and XIV. 



Abbreviations. 



The abbreviations are the same in all the figures. 



acm commiss lira anterior, praecominissura, 



cal corpus callosum, 



cal' bundle ascending with the corpus callosum and passing back 



above the foramen of Monro, 

 chm optic chiasma, 

 ctn', cm", cm'" lower, middle and upper division of the commis- 



sura interlobularis, 

 cm"" anterior portion of the upper division of the commiss ura 



interlobularis, 

 dc diacoelia, 3rd ventricle, 

 fm foramen of Monro, 



for and for' columnae and crurae of the fornix, 

 gh ganglion habenulae, 

 hem right cerebral hemisphere, 

 n lower internal or median cell area of the cerebral hemispheres 



in the Amphibia, 

 mf medullary folds, 



o.cm commissure of the olfactory lobes (pars olfactoria?) 

 olf olfactory lobe, 



ol.i internal olfactory bundle, forming the chiasma, 

 pal pallium or mantle of the cerebral lobes, 

 pan coramissura posterior, post commissura, 

 ped cerebral peduncles, 



pi lateral division of the cerebral peduncles, 

 pm median division of the cerebral peduncles, 

 jm remnant of the processus pinealis, pineal gland (Testudo;, 

 2).ol pars olfactjoria of the anterior commissure, 

 2)t pars temporalis of the anterior commissure, 

 pre procoelia, lateral ventricle, 

 rhc rhinocoelia; ventricle of the olfactory lobe, 

 scm commissura superior (tenuissima), supracommissura. 



