( 307 ) 



3'''\ nearly the wliole of the Lobus simplex in the depth, 

 whilst, towards the paramedian line, likewise those por- 

 tions of gyri, which remained intact on the surface, have 

 been divided from the primary radius medullaris. 



In the part, situated to the right of the paramedian line, 



as far as the lesion extends ; 

 1"^ nearly the whole of the posterior folium of the Lobus 

 anterior ; 

 2"'^ the greater part of the Lobus simplex. 



Physiology. — "The designs on the skin of the vertebrates, considered 

 in their connection iinth the theory of segmentation." By 

 Dr. G. VAN RiJNBERK. (Oommunicated by Prof. C. Winkler). 



That there exists some connection between the distribution of 

 pigments in the skin and its segmental innervation will be evident 

 to any one who has made some investigations into the questions 

 concerning the theory of segmentation. Different authors have made 

 numerous unconnected researches about this subject. Sherrington *) 

 has pointed out that the stripes of the zebra are ranged in segments 

 on neck and trunk ; whilst he identifies the cross-stripe over the 

 shoulders of the ass with its dorsal axis-line for the anterior extremity. 

 Winkler '') has drawn attention to the fact that deep-coloured rabbits 

 often show white spots, presenting a marked conformity in distri- 

 bution and extension with the analgetic areas that are produced 

 when one or two of the posterior roots of the spinal nerves have 

 been cut through. It may therefore readily be assumed that these 

 white spots find their origin in the fact that either one or several 

 segments lack the faculty of producing pigment. Allen ") has 

 demonstrated that certain series of spots on the skin of the squirrel 

 correspond with the points of entrance into the hypodermis of series 

 of skinbranches of the intercostal and other homologous nerves. Two 



1) G. S. Sherrington, Experiments in examination of the peripheral distribution 

 of the fibres of the posterior roots of some spinal nerves. Philosoph. Transactions 

 of the Royal Society. London, vol. 184 B. p. 757. 



2j G. WInkler, Ueber die Rumpfdermalome. Monat schrift fur Psychiatrie und 

 Neurologic. Bd. XIII, 1903, h. 3, S. 173. 



^) H. Allen, The distribution of the colour-marks of the mammalia. Proceedings 

 of the Academy of Nat. Sciences of Philadelphia, 1888, p. 84 et seq. — See also, 

 Science. 1887. 



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