528 



F. H. EDGEWORTH. 



abut 011;^ or even reach a higher level than (text-fig. 32, p. 536), 

 the Gasserian ganglion, and similarly forms a strip lying across 

 and outside the pterygoid process of the quadrate (text-figs. 

 10, 18, 32, 36, pp. 518, 525, 536, 541), and then divides into 

 an upper and a lower part. 



fi sup. 



O.sup. 



pty pr. oftjuBd. 



/>.exe. 



O.aup 



mond.my up. 

 gaas.g- 



pty.pr of quad. 



.A.y. 



24 



Text-FIGS. 23 and 24. — Saj^ittal sections througli an embryo of 

 Splienodon, in "stage P-Q" of Howes and Swinneiton. 23 is the 

 more external. (For explanation of lettering see p. 555.) 



In Gallus, which preserves a movable pterygo-qnadrate, 

 the upper part of the myotome, after separation of a strip to 

 form the depressor palpebra3 iuferioris (text-fig. 16, p. 523), 

 ' First described by Corning in Lacerta. 



