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TABLE XXIX. 



Systematic Survey of the Evolution of the Skin-coyeri-ig and 



Nerve System. 



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



Skin 



(D' rma, 



or 



Integumentum) 



Outer-skin 

 (Epidermis') 

 Product of the Skin^ 

 sensory-layer 



(Horn-layer of the outer 

 skin 

 (ytratum cornrum) 

 Mucous layer of the 

 outer skin 

 (^Stratum mucosum) 



Leather-skin 



(Coi i«m) 



Product of the Skin 



fibrous-layer 



i Fibrous layer of the 

 leather skin 

 (Cutis) 

 Fatty layer of the leather 

 skin 

 (Subcutis) 



I Hair 



Nails 

 1 Sweat glands 

 1 Tear glands 



Sebaceous glands 

 VMilk glands 



/ Connective tissue 

 Fatty tissue 

 ]\Iuscular tissue 



(Blood-vessels 

 Papillffi of taste and 

 nerves of tho 

 Ifather skin 



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



Central 3ffarrow, 



or 



Central Nerve 



System / 



(Psyrhe, or Medulla \ 



Centralis). 



Product of the 



Skin-sensory 



layer 



Fore-brain 

 Q'rotopsyche) 



II. Twlxt-brain 



(^Deutopsyche) 



III. Mid-brain 



(Mesoj)sycJie) 



IV. Hind-brain 



(^JMapsyche) 



After-brain 

 (Epipsyche) 



'Great hrmispheres 

 Olfactory lobules 

 Lateral chambers 

 Streaked bodies 

 Arch 



V Cross piece 



f Centre of siprht 

 j Third chamber of the 

 < brain 

 I Pineal body 

 [ Funnel 



r Four bulbs 

 -j Aqueduct of Sylvius 

 l^ Brain stalks 



f Small hemispheres 

 -| Brain worm 

 (^ Brain bridge 



r Pyramids 



Olives 

 ■I Restiform bodies 



Fourth chamber of the 

 l_ brain 



^VI. Dorsal Marrow Notopsyche 



remifphfrrcE cerebri 



I.ohi olfactorii 



Ventriculi lateralet 



Corpora striata 



Fornix 



Corpus callosum 



Tlialami nptici 

 Ventriculus tertitts 



Covarivm 

 Infundihulvm 



Corpus bigeminum 

 Aqiiaductus Si/Ivii 

 Fedunculi cerebri 



Hemispharm cerehelli 

 Vermis cerebelli 

 Pons Varolii 



Corpora pyramidalia 

 Corpora oliraria 

 Corpora restiformia 

 Ventriculus quartus 



Medulla spinalis 



Medullary 

 coverings 

 (Meninges) 



'Enveloping mem- 

 branes, with the 

 nutritive blood- 

 vessels of the brain 

 and spinal cord 



1. Soft medullary skin Pia mater 



2. Central meduUaiy skin Arachnoidea 



3. Hard meduU iry skin Dura mater 



(Products of the skin-fibrous layer) 





