550 THE ORGANS 



tion (technic p. 39, Xo. 2), both for the neurofibrils and for the external mor- 

 phology of the neurones. It is especially successful with the cerebellum. 

 (6) Neuroglia stains should also be used. 



The Pituitary Body 



{See page 413.) 



The Pineal Body 



The pineal body originates as a fold of the wall of the primary 

 brain vesicle. It lies upon the dorsal surface of the inter- and mid- 

 brain, being connected with the former. The pineal body is appar- 

 ently of the nature of a rudimentary sense organ, being sometimes 

 referred to as the median or pineal eye. In man it is surrounded 

 by a firm connective-tissue capsule, w^hich is a continuation of the pia 

 mater. This sends trabeculae into the organ, which anastomose and 

 divide it into many small chambers. The latter contain tubules or 

 alveoli lined with cuboidal epithelium. This may be simple or strati- 

 fied, and frequently almost completely fills the tubules. Within the 

 tubules are often found calcareous deposits known as "brain sand." 



TECHNIC 



The general structure of the pituitary body and of the pineal body can be 

 studied by fixing material in formalin-lMuller's fluid (technic 6, p. 7) and staining 

 sections with haematoxylin-eosin (technic i, p. 20). 



General References for Further Study 



Bailey and Miller: A Text-book of Embryology, New York, 1909. Chaps 

 XVII and XVIII. 



Barker: The N^ervous System and its Constituent X'eurones, X^ew York, 

 1899. 



Dejerine: Anatomic des centres nerveux, Paris, 1895. 



Edinger L.: Vorlesungen iiber den Bau der nervosen Zentralorgane des 

 Menschen und der Tiere, Leipsig, 1908 and 191 1. 



\'an Gehuchten: Anatomie du systeme nerveux de I'homme, Louvaine, 

 1906. 



Golgi: Untersuchungen iiber den feineren Bau des centralen und peripher- 

 ischen X'ervensystems, Jena, 1894. 



Johnston, J. B.: The Xervous System of Veterbrates, 1906. 



Kolliker: Handbuch der Gewebelehre des Menschen, Leipsic, 1896. 



Von Lenhossek: Der feinere Bau des Nervensystems im Lichte neuester 

 Forschungen, Berlin, 1895. 



