31 ß 



H. H. WILDER, 



Description of tlie Figures. 



Abbrevi 

 Cartilages. 



A. Arytaenoids. 



N. Annulus, 



T. Tracheal elements. 



S. Apical cartilages (cartilages of 



Santokini). 

 Ss. Sesamoid cartilages. 

 A.A. Accessory arytaenoids. 

 Lat. Lateral cartilages (= A -\- T). 

 ph. m. Middle pharyngeal process. 

 ph. a. Anterior pharyngeal process. 

 bro. Bronchial processes. 

 C. Cardiac processes. 

 thy. Thyroid processes (of the hyoid). 

 I-ir. Gill arches. 

 {IV) Rudiment of 4th arch. 



Muscles. 



I. a. 1 — 4 Levatores arcuum I — IV. 

 Pet. 1—4 Petro-hyoidei I— IV. 

 Hyo gl. Hyo-glossus. 

 dig. md. Digastricus mandibularis. 

 c. arc. br. Constrictor arcuum bran- 



chiarum. 

 %.^Ä. Hyo-pharyngeus (= F„). 



ati n s. 



dig. ph. Digastricus pharyngis 

 (= D, + V,). 



d. I. Dorso-laryngeus. 



d. tr. Dorso-trachealis. 



Ig. d. Laryngeus dorsalis. 



Iq. V. Laryngeus ventralis. 



Sf. Sphincter laryngis. 



Sf. d. Sphincter dorsalis. 



Sf. V. Sphincter ventralis. 



Cs. Constrictor laryngis. 



Cp. Compressor laryngis. 



t. Dilatator laryngis. 



f. t". Accessory slips of the pre- 

 ceding. 



ts. Tensor chordarum. 



Other parts. 



R. r. V. Ramus recurrens Vagi. 



* Ligament prolonging lateral car- 

 tilage (Necturus). 



y Ligament from ends of gill 

 arches in Amphiuma used for 

 attachment of muscles. 



ch. voc. Vocal chords. 



Plate 19. 



Figs. 1 — 7. Necturus lateralis. Laryngeal 

 dividual variation and changes during growth. 



cartilages showing in- 



above; their dorsal integument has been retained and pinned back to 

 show the origin of the muscles. Lettering as in diagram. 



