( 2^^ ) 



TABLE XXXIII. 



SjEitematio Survey of the Development of the Hainan Ear. 



I. Surrey of the parts of the Internal Ear. (Apparatus perceptlre of souaA.) 



1. Stalk of the primary 1. 4<luP<^uct of the Aqu(Eductu$ vesttbuli 



ear- vesicle vestibule (Due- s.Recettutldhyrintki 



tus endolym- 

 phaticiis) 



riiLjii-f^jif thf J 2, 3. Upper part of the 2. Ear-pouch Utriculut 



mancis oi me < primary ear-vesicle 3. Three seml-circu- Canale* ttmi-cireu- 



Eonx-plate 



lar, or curved 

 canals 



4, 5. Lower part of the 4. Ear-sac 



primary ear- vesicle 5. "The snail" 



lart* 



Sacculut 

 Cochlea 



B. 



Products of the 



Head-plate 



6. Auditory nerve 6. Auditory nerve Ntrvus aeuttiau 



1. Bony covering of the 7. Osseous labyrinth Labyrinthiu otaexu 

 membranous laby- 

 rinth 



8. Bony covering of the 8. " The stony bone " 0$ petrotum 



\ whole internal ear 



n. Survey of the parts of the Intermediate and External Ear. (Apparatus for the 



conveyance of sound.) 



C 

 Products of the 



first 



OiU-opeuing 



/- 9. Inner part of the first 



gill-opening 



10. Central p irt of the first 



gill-opening 



11. Closed part of the first 

 gill-opening 



/12. Upper part of the 

 second gill-arch 



D. 



Products of the 

 first two 



Gill-arohei 



Prodack of the 



Head-plate 



Product of the 

 Skm-oov«ring 



< 



13. Upper part of the first 



gill-arch 



14. Central part of the first 



gill-arch 



16. Tympanic circle 



(Annulus tympanicut) 



'16. Circular membranous 

 fold at the closed part 

 of the first gill- 

 oponing 



9. Eustachian tube Thiba Eustachii 



10. Tympanic cavity Cavwm tympani 



(Interior of the 

 drum) 



11. Tympanic mem- Mcmbrana tympani 



brane (Head of 

 the drum) 



12. Stirrup (First Sta/pt» 



bonelet of the 

 ear) 



13. Anvil (Second IneuB 



bonelet of the 

 ear) 



14. Hammer (Third MaOeuM 



bonelet of the 

 ear) 



15. Bony outer audi- Maahu oudUorim 



tory passage otteut 



16. Ear-shell 



Oonchaauria 



17. Rudimentary ear- Muaouli oonchat 



