238 



F. H. EDGE WORTH. 



loo-ous with the transversi ventrales of the fourth and fifth 

 arches. 



The coraco-brauchialis V divides, in 14 mm. embryos, into 

 phai-yugo-clavicularis inteinus and externus. 



The upper ends of the first branchial myotomes form leva- 

 tores arcuum branchialium ; the first two broaden transversely 

 (Text-fig. 29) and divide into external and internal portions. 

 The first and second externi and third and fourth levatores 



Text-fig. 61. 



l-HaAi] I 



UA-CLfVO 



ifcA«uAucrui 



er. 



Runa, larva with lar;j;e hind legs, transverse section. 



become attached to the first, second, third, and fourth epibran- 

 chials, the first iuternus to the second pharyngo-branchial, and 

 second internus ' to the third pharyngo-branchial constituent 

 of the superior phai^yngeal bone- of Allis (os pharyngeum 

 superior of v. Wijhe, Pharyngealplatte of Wiedersheim), 

 All take their origin from the auditory capsule. The 



' Protractor laryngis of Wiedersheim. 



- The OS phai-yngeum superior of Aniia and Lepidosteus (Text-fig. 

 25) is formed hy the union of the pliaryngo-branchials of the thii-d ;nid 

 fourth arches — bearing out the tlieory of v. Wijhe. 



