1881.] ^4:d [Wilder. 



itself, as has long been known in the case of the human brain, near the 

 Nudeits amygdalm. Prof. Wilder's term is the only admissable one, both 

 as being descriptive and on grounds of priority." 



Chiasma. — ch. — How complete is the decussation ? Of course, micro- 

 scopic sections must be made, but something might be ascertained by 

 tearing apart the fasciculi after proper treatment to harden the nervous 

 tissue, and soften the connective. 



Cimhia.—cmb. — Without seeing Gudden's paper, I have assumed that 

 this is the "tractus transversus peduncuU" mentioned by Meynert (A, 

 737). Something of its course after it enters the crus may be seen from 

 microscopic sections ; I have not examined its dorsal end. 



Gommissurafornieis. — Gs. f. — Is it constant in the cat, and is it repre- 

 sented in man and other mammals. Is it a true commissure? 



Grista {fornicis). — crs. f. — What are its histological composition, its func- 

 tion, and its morphical significance? In what other animals does it 

 exist? See my paper (7). 



Diatela. — dtl. — The roof of the " third ventricle. " What is its histo- 

 logical composition? What is its relation to the velum, or the pia in 

 general ? How are the diaplexuses connected with it ? 



Diaplexus. — dpx. — Are these formed by the intrusion of the border of the 

 velum, or by only a fold of endyma ? See auliplexus. 



Foramen Magendie. — Fm. Mg. — The alleged communication between the 

 metaccelia "fourth ventricle" and the "subarachnoid space." Does it 

 exist in the cat? What are its exact position and form? Is there more 

 than one? Does it permit the passage of liquid in one or both directions? 



Flocculus. — flc. — Is this represented in the cat? 



Hypocampa. — hmp. — What is its relation to the fornix and the fimbria? 



Insula. — ins. — Is the "Island of Reil " represented in the cat by any 

 distinct elevation ? If not, what part of the surface corresponds with it ? 



Inter optici. — iop. — Is this pair of lobes, discovered by Spitzka {4, 5, 

 and 11,) in some reptiles, represented in the cat? 



Lyrn. — ly. — What are its form, extent, connections and manner of for- 

 mation ? Is it in fact a distinct structure, or only a surface ? 



Metatela. — mttl. — The membraneous roof of the "fourth ventricle." 

 What are its form, attachments and histological composition ? What are 

 its relations to the metaplexus ? 



Myelon and metenceplialon (medulla). Leaving their histology out of the 

 question, I have not been able to satisfy myself regarding the relations and 

 nomenclature of the visible components of these parts. 



Pia {mater). — pi. — Does it consist of one, two, or more layers? What 

 are the relations of its layers to the Fissura media, and to the intervals be- 

 tween the cerebellum and hemispheres, and the cerebellum and medulla? 



Porta. — p. — In my paper (S) are given reasons for considering that there 

 are two portse leading from the mesal aula in the two procceliis. 



Prcegeniculatum. — prgn. — Is there not some external or structural line of 

 demarcation between the thalamus and the prcegeniculatum f 



