1022 



ANALYTICAL INDEX. 



Nervous System (continued). 

 developement of nerve, 600 

 recapitulation, 601 



Nervous System, Comparative Anatomy of, 601 

 in the Acrita, tiOl 

 in the Polypifera, 601 



Actinia, 601 

 in the Radiata, 602 

 in the Mollusca, 603 

 Tunicata, 603 



Ascioliamammillata, 603 

 Phallusia intestinalis, 603 

 Conchifera, 603 

 Gasteropoda, 605 



Limpet (Patella), 605 

 Chiton marmoratus, 606 

 Aplysia, 606 

 Scyllsea pelagica, 606 

 Limax ater, 606 

 in the Articulaia, 606 

 Entpzoa, 607 

 Rotifera, 607 

 Cirropoda, 607 

 Annelida, 607 

 Crustacea, 60S 

 Myriapoda, 609 

 Arachnida, 609 

 Insecta, 609 



Ranatra linearis, 610 



Geotrupes stercoranus, 610 



Dyticus marginalis, 611 



Saturnia pavonia minor, 611 



Mormo Maura, 612 



motor and sensitive function of ganglionic 



and non-ganglionic cords, 613 

 concluding general remarks, 6(4 

 in the Vertebrata, 614 

 Pisces, 614 



anatomy of the Amphioxua Lanceolatus, 615 

 neuro-skeleton, 615 

 nervous system, 616 

 brain of fishes, 618 



weight of the brain compared with that of the 



body, 618 



olfactory tubercles, or first cerebral mass, 618 

 optic lobes, or second cerebral mass, 619 

 cerebellum, or third cerebral mass, 619 

 Amphibia and Reptilia, 620 

 brain, 620 



weight compared with that of the body, 62O 

 olfactory tubercles, 621 



brain and spinal cordoflizard, 621 

 optic lobes, 621 

 cerebellum, 621 * 

 Aves, 621 



brain, 622 



weight compared with that of the body ,622 

 cerebral hemispheres, 622 

 optic lobes, 622 

 cerebellum, 623 

 Mammalia, 623 



table of the relative proportions of the brain 

 and spinal marrow in the four classes of 

 Vertebrata, 623 



table of the relative proportions of the body 

 and brain in the four classes of Vertebrata, 

 624 



cerebral hemispheres, 624 

 corpus callosum, 625 

 ventricles of brain, 625 

 olfactory nerves, 625 

 optic lobes, 625 

 cerebellum, 625 



table shewing the actual and relative lengths 

 of the cerebral hemispheres and the cere- 

 bellum in the Mammalia, 626 

 general remarks in conclusion, 626 

 Nervous Centres. 



coverings of the nervous centres, 627 

 coverings of the ganglions, 627 

 coverings of the spinal cord and brain, 62" 

 dura mater, 627 

 spinal, 62S 

 cranial, 628 



processes, 629 



falx cerebri, 629 

 tentorium cerebelli, 629 

 falx cerebelli, 629 



vessels of the spinal dura mater, 629 

 of the cranial dura mater, 630 

 sinuses, 611 



superior longitudinal, 631 

 inferior longitudinal, 631 

 strait, 631 



torcular Herophili, 631 

 lateral sinuses, 632 

 occipital, 632 



petrosal, superior and inferior, 632 

 transverse, 632 

 rnvi'inous, 633 

 i ircular, 633 

 pia malrr, M.? 



of the spinal cord, 633 



Nervous Centres (continued). 



of the brain, 634 



continuations of the pia mater into the 

 cerebral ventricles, 634 

 choroid plexuses of the lateral ventri- 

 cles, 634 



velum interpositum, 635 

 choroid plexuses of the fourth ventri- 

 cle, 635 

 chrystalline formations in the 



choroid plexuses, c. 635 

 connexions, &c. ot the pia mater, 636 

 in reference to pathology, 636 

 arachnoid, 636 

 spinal, 636 

 cerebral, 637 

 cerebro-spinal fluid, 637 

 fluid in the cerebral ventricles, 640 

 orifice of communication, as described hy 

 Majendie, between the fourth ventricle and 

 the sub-arachnoid space, 640 

 estimate of the quantity of the sub-arachnoid 



fluid, 641 

 cerebro-spinal fluid in reference to pathology, 



642 



manner of its secretion, 643 

 physical and chemical characters, analyses,643 

 use, 643 

 glandulae Pacchioni, 644 



are they natural structures? 645 

 ligamentum dentatum, 645 

 general remarks on the structure of nervous centres, 



646 



white nervous matter, 646 

 grey nervous matter, 647 

 development, 643 

 remarks on the great simplicity of form of I he 



elements of grey nervous matter, 649 

 pigment, 649 



structure of ganglions, 649 

 cerebro-spinal centre, 650 

 epinal cord, 650 

 position, 651 

 shape, 651 

 bulk, 651 



length and circumference, 651 

 fissures, 652 



anterior, 652 



posterior, 652 



grey commissure, 652 



internal structure as shewn by transverse sec- 

 tions, 652 

 conclusions, 654 



is there a central canal in the spinal cord ) 655 

 bloodvessels, 656 



anterior spinal artery, 656 

 posterior spinal arteries, 657 

 veins, 657 

 spinal nerves, origin, anterior and posterior 



roots, ganglion, 657 

 sub-occipital nerve, 658 

 characters proper to the nerves of particu- 

 lar regions, 658 

 cervical nerves, 658 

 dorsal nerves, 658 

 lumbar nerves, cauda equina, 658 

 relations of the roots of the nerves to the 

 columns of the cord and to the grey 

 matter, as determined by dissection, 6:>ff 

 as determined by physiology, 660 

 encephalon, 661 



size compared with that of the body in diffe- 

 rent animals, 661 

 compared with that of the encephalic 



nerves, 662 

 weight of the human encephalon, 662 



table showing the average absolute weight 

 of the human encephalon, in males and 

 females, 662 



relative weight of encephalon to 



cerebellum, &c. in males and females, 

 663 



relative weight of entire body to 



encephalon, cerebrum, cerebellum, &c. 

 663 



conclusions, 6 r >4 



absolute weight of the brain of the ele- 

 phant and whale, 664 

 weight of brain of some animals greater 

 than that of man, relatively to the 

 weight of their bodies, 664 

 conclusions of Tiedeman, deduced from 



his observations, 664 

 remarks on the comparison of the brain of 



man with that of the lower animals, 664 

 the brain in different races of mankind, 665 

 method of examining the brain, 667 

 method of Willis, 663 



of Reil, Gall, and Spurzheim, 6C9 



surface of the encephalon, 670 



superior and lateral surfaces, 670 

 base of the brain, 670 



anterior segment, olfactory sulcus, 670 



