Cbe l^orlU'fii anatomifitfi 



cylinder of a nerve, separating it from 

 the white substance of Schwann, is 

 named Mauthner's sheath. 



Meckel, Johann Friedrich, Sr. — A German 

 anatomist, born at Wetzlar in 1714; died 

 in Berlin, 1774. The spheno-palatine 

 ganglion — the largest of the cranial 

 ganglia — is named for this anatomist. 

 Meckel's diverticulum is also named 

 for him. In 1856, Dr. J. M. Carnochan, 

 of New York, first removed ^Meckel's 

 ganglion and the second division of 

 the fifth nerve for the relief of 

 neuralgia. 



Meckel, Johann Friedrich, Jr. — A German 

 anatomist, born at Halle in 1781 ; died, 

 1833. Grandson of Johann Friedrich 

 Meckel, Sr., mentioned in the preced- 

 ing paragraph. Meckel's cartilage of 

 the mandibular arch in the embryo is 

 named for this anatomist. 



Meibom, Heinrich. — A German physician, 

 born at Lubeck in 1638; died at Helm- 

 stadt in 1700. ^The series of acinous 

 sebaceous glands situated on the mar- 

 gin of each ej-elid are named Meibo- 

 mian glands, after this physician. 



Meissner, Georg. — A German physiologist, 

 born in Hanover in 1829. His name is 

 especially associated with Meissner's 

 plexus of nerves in the sub-mucous 

 layer of the small intestine. He was 

 professor of physiology at Gottingen. 



Merkel, Karl Ludwig. — A German anat- 

 omist, born in Leipzig in 1812 ; died 

 1876. The tactile corpuscles, the small 

 .sub-epidermic groups of ganglion cells 



