( 232 ) 



TABLE XXIX. 



Systematic Survey of the Evolution of the Skin-covering and 

 iNerve System, 



XXIX. A. Survey of the Evolution of the Skin-covering. 



/Horn-layer of the outer /Huir 

 Outer-skin skin Nails 



(Epidermis) J (Stratum corneuiri) \ Sweat glands 



Product of the Skin- 1 Mucous layer of the "1 Tear glands 



Skin 



(^Dcrma, 



or 



Integumentum') 



sensory-layer 



outer skin 

 (Stratum mucosuin) 



Lealher-skin 

 (Co)ium) 

 Product of the Skin^ 

 fibrous-layer i 



/^Fibrous layer of t 



1 leather skin 



I (Cutis) 



] Fatty layerofthe leather" 



(Subcutis) 



\ Sebiiceous glands 

 IWilk glands 



'Connective tissue 

 Fatty tisjiue 

 Muscular tissue 

 Blood-vessels 

 Papilla of taste and 



nerves of the 



leather skin 



XXIX. B. Survey of the Evolution of the Central Marrow. 



Central Marrow, 



or 



Central Nerve 



System 



(Psyche, or Medulla 



Centralis). 



Product of the 



Sklu-sensory 



layer 



1 Great hemispheres 

 Olfactory lobules 

 Lateral chambers 

 Streaked bodies 

 Arch 

 Cross piece 



f Centre of sight 



Twixt-brain J '^'I'Tl'^''™''" "^ ""^ 

 , „ . 1 ^ < brain 



iDeuiapsyohe) , pj^^.^, ^^^^ 



[Funnel 



, Mid-brain 

 (Mesopsycke") 



Hind-brain 

 (Metapsyche) 



After-brain 

 (^Epipsyche) 



C Four bulbs 

 -| Aqueduct of Sylvius 

 I, Brain stalks 



f Small hemisphere* 

 •\ Brain worm 

 I. Brain bridge 



f Pyramids 

 I Olives 

 -{ Restiform bodies 



Fourth chamber of the 

 i. brain 



VI. Dorsal Marrow Notopsyche 



J!cmisp?i(erm cerebri 



Ldbi olfactorii 



Ventriculi laterales 



Corpora striata 



Fornix 



Corpus callosum 



Thalami optici 

 Ventriculus tertius 



Conarium 

 Ivfundibulum 



Corpus Tyigeminum 

 Jqurrductus Sylvii 

 Fedunculi cerebri 



JTemispJuErm cerebelU 

 Vermis cerebelU 

 Pons Varolii 



Corpora pyramidalia 

 Corpora olivaria 

 Corpora restiformia 

 Ventriculus quartus 



Medulla spinalis 



Medullary 

 covering's 



(^Meninges) 



I Enveloping mem- 

 branes, with the 

 nutritive blood- 

 vessels of the brain 

 and spinal cord 



1. Soft medullary skin Pia mater 



2. Centralmedullaryskin Arachnoidea 



3. Hard medulbiry skin Dura mater 



(Products of the skin-fibrous layer) 



