740 HUBER. 



EXPLANATION OF PLATE XXXVI. 



Fig. 17. Cross-section of upper end of implanted segment one hundred and 

 fifty-two days after implantation. Miiller's fluid hardening. Stroebe's stain. 

 Leitz objective 7, ocular No. 3. Shows cross-section of small nerve bundles 

 varying in size in groups of 3-5, separated by a small amount of fibrous connective 

 tissue. 



Fig. 18. Cross-section of lower end of implanted segment one hundred and 

 fifty-two days after implantation. Miiller's fluid hardening. Stroebe's stain. Leitz 

 objective 7, ocular No. 3. In this figure the nerve bundles (a) are much more 

 scattered than in Fig. 17, separated by a larger amount of fibrous connective tissue. 



Fig. 19. Cross-section of peripheral ulnar at wrist one hundred and eighty-two 

 days after implantation. Miiller's fluid hardening. Stroebe's stain. Leitz y^ 

 in., oil immersion, ocular No. 3. a, completely regenerated fibres with well- 

 developed axis cylinder and medullary sheath ; b, regenerating fibres, axis cylinder 

 developed but not the medullary sheath ; c, empty sheaths, probably of old fibres. 



Fig. 20. Longitudinal section through tissue supplanting implanted bundle of 

 catgut, one hundred and fifty-two days after implantation. The sketch was made 

 of section taken about i ctm. below central wound. Miiller's fluid hardening. 

 Stroebe's stain. Bausch and Lomb \ in. obj., and Leitz ocular No. 3. C, central- 

 ward; P, peripheral-ward. A number of small nerve bundles are seen passing down 

 between bundles of fibrous tissue, a, bundles having a course in line with axis 

 of ulnar nerve in this portion of arm ; b, a bundle having a wavy course ; c and d, 

 passing in a direction nearly at right angles with the other nerve bundles ; /, blood 

 vessels. It will be noticed that a relatively large amount of fibrous connective 

 tissue intervenes between the nerve bundles. 



Fig. 21. Cross-section through tissue supplanting implanted catgut bundle 

 one hundred and fifty-two days after operation. The section was made about 

 2 ctm. below central wound. Miiller's fluid hardening. Stroebe's stain. Bausch 

 and Lomb \ in. obj., Leitz ocular No. 3. Many of the connective tissue bundles are 

 seen in cross section (a) ; some in longitudinal or oblique section {b) ; c, blood vessels; 

 d, small nerve bundles in cross-section ; e, bundles cut longitudinally in section, 

 must, therefore, have had a course at right angles to longitudinal axis of ulnar 

 nerve in this part of fore-leg. 



