B1BLIOGKAPIIY. 437 



a special structure. Certain of its cells form more or less cyl- 

 indrical masses with a reticulated appearance. Between these 

 cellular groups a network of blood-vessels is soon found, so 

 that the whole structure is now not unlike embryonal hepatic 

 tissue. In rabbits, Kolliker saw the first traces of these bodies 

 about the twelfth or thirteenth day. On the sixteenth day 

 they had already attained a length of 1.56 mm., and occupied 

 a position along the vertebral column from the first to the fourth 

 and part of the fifth lumbar vertebra. On cross sections of em- 

 bryos sixteen days old, Kolliker found that the suprarenal cap- 

 sules were distinctly separate at their upper borders, whereas 

 their lower ends were joined together to form a single organ. 

 The same writer also found a nervous ganglion at the coalesced 

 central portions of somewhat older embryos. 



Behind the suprarenal capsules a second sympathetic 

 ganglion was discovered. Remak and v. Brunn do not in all 

 respects corroborate the statements of Kolliker. The latter 

 was unable to ascertain any existing relationship between the 

 nervous system and the suprarenal capsules. 



BIBLIOGRAPHY. 



BERGMANN. De glandulis suprarenalibus. Diss. inaug. Gottingen, 1839. 

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Physiologic, Bd. IV. 1849. 



H. FRET. Art. u Suprarenal Capsules" in Todd's Cyclopaedia of Anat. 1849. 

 REMAK. Untersuchungen ueber der Entwickelung d. Wirbelthiere. Berlin, 1853- 



1855. 



VIKCHOW. Zur Chemie der Nebennieren. Virchow's Archiv, 1857. 

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B. WERNER. De capsulis supraren. Dorpat Dissertatio. 1857. 

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Napoli. 



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