ISh 'V\\o I'lhislic 'I'issuc of the lliiiii.iii Lur^lix 



libroiis tist^iio I'oni posing" tlio procc'ss. iioi- is il rcnccicd u|ion tlio sides 

 of it. iis (Icscrihcd hy KiilziMislciii. Tlic wlmlc jtroccss is loi'iiicd by a tliick- 

 ciiiiiu' of i\]o |)(M'icli(Mi(lriuin. wliicli pusses direcily l)ack\var(l to receive the 

 iittiieliineiit o\' fli(> clastic l\\)vvs of the ligameiita vocalia. ^J'liis is indi- 

 cated by the urrangeincnt o\' the chistic libers of the i)erichondriuin at 

 this point, Avhicli, adjacent to the tliyroid cartilage, are directed eitlier 

 antcri)-posteriorly or obliquely. Tlie attachment of the elastic fibers of 

 the liganienta vocalia at this jioint is comparable to their attachment 

 by means of tlie pcrii-hondriuni to the laryngeal cartilage at other points. 

 The great increase in tlu> amount of elastic tissue in the ligamenta vocalia 

 cieinands an increase in the number and size of the perichondrial fibers 

 to which tlu>y are attached. This increase, gradual from below up- 

 wards, correspoiuls to the increase in the number of the tibers composing 

 the conns elasticus, as it passes upward. 



Adjacent to tlie tliyroid cartilage, the (ihers iwc grouped in vertical 

 bundles, whit'h are separated from each other by hoi'izonfal fibers. Pos- 

 teriorly, the perichondrial fibers are collected into horizontal bundles, 

 which are separated from eacli otluu' by blood vessels, and ducts of glands, 

 verticallv directed. Into tliese pai'alh^l bamls of librous tissue are attached 

 })arallel bundles of elastic fibers, whicli pass oil' fi'om the nodules occujiy- 

 ing the anterior extremities of tlie ligamenta vocalia. Scattered 

 throughout the jieivichondrium at this point are lin(^ elastic libers, verti- 

 cally directed. I have been unable to find cartilage cells as far posterior 

 as described by Friedrich and Katzenstein. These cells seem to be 

 ri>stricted to a narrow zone immediately adjacent to the thyroid carti- 

 lage. 



In specimens stained by Van Gieson's method, fibrous hands are seen 

 to pass off posteriorly from perichondrium to surround a luulule, which 

 occupies the anterior extremity of each ligamentum vocale, and which 

 i< composed of round and spindle cells. While histologically these 

 nodules resemble somewhat those found anterior to the processus vocales 

 of the arytenoid cartilages, I have been unable to (iiid cartilage cells 

 in them. (Sec Fig. 9.) 



In specimens stained by Weigert's method, ilu^ elastic fibers of the 

 ligamentum vocal(> will he sihmi to ])ass into the nodule, parallel to each 

 other, posteriorly, wliile from its anterior extremity and medial surface^ 

 several heavy bundles of anastomosing elastic fibers pass off, to be attached 

 to the parallel fibers of the perichondrium. Some elastic fibers appar- 

 ently originate in the nodule, for t1ie fibers passing off from its anterior 

 extremity exceed in luimber those passing into it posteriorly. 



In conclusion, I agree Avith Friedrich in not considering the process 



