[98] degeneration. The fibrils are less distinct than usual, and 

 the nuclei may be found scattered throughout the substance 

 of the fibres. The muscle is, in fact, in an advanced stage of 

 simple atrophy. 



No one of the blood-vessels stands out preeminently in 

 size. The largest artery is on the left side, held in place by 

 strong connective-tissue bundles. This may be seen in sec- 

 tions through the middle (Fig. 5, A), as well as through the 

 base of the tail. There are several smaller vessels in the 

 vicinity. Two small arteries are seen in the right dorsal 

 quadrant near the centre and one just beneath the corium, 

 fo the left of the mid-line. The veins are small and incon- 

 spicuous. There is nothing to be seen of a tuft -like branch- 

 ing of the vessels as Virchow describes in one of his cases, 

 nor is there anything resembling erectile tissue.'*' There is, 

 however, an abundant supply of blood-vessels in the corium. 



A number of small nerve trunks (Fig. 5, N) run longitu- 

 dinally in the areolar tissue of the appendage. The majority 

 of these accompany blood-vessels. 



Similar Cases. — While it is not practicable to enumerate 

 here all of the similar cases which have hitherto been re- 

 ported, there are some which for one reason or other are of 

 especial interest. The tail of a Moi,'' ten years of age, which 

 had attained the length of over twenty-five centimeters, is 

 interesting on account of its size. Many of the cases have 

 been described very briefly and only as regards external ap- 

 pearance. There are, however, a number of cases which have 

 either been dissected or examined microscopically. These 

 include Greve's case described by Virchow,'* and cases re- 

 ported by Meyers,'^ Vinogradow,^" Eodenacker and Schebold- 



15 Virchow' s Arcliiv, Bd. 79, 1880. 



i*' Bartels : Archiv f. AnthropoL, Bd, xv, p. 116. 



1'' Caudal Appendage iu Man. (From the French of Etienne Rabaud, 

 in " La Naturaliste.") Scientilic American, vol. 50, 1889. 

 18 Virchow's Archiv, Bd. 79, 1880. 

 laProc. N. Y. Pathol. Soc, 1893. 



■^0 K. N. Vinogradow : On Human Tails. Vrach, vol. xv, 1894 (Russian). 

 21 G. Rodenacker : Ueber den Siiugethierschwanz mit besonderer 



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