28 



MR. F. E. BEDDARD ON THE 



[Jan. 14, 



A large number of its fibres end upon the oesophagus both laterally 

 and ventrally. In fact the muscle is chiefly an oesophageal muscle, 

 and has less i-elation with the respiratoiy apparatus. It is, how- 

 ever, connected Avith the root of the lung where the walls of this 

 sac, as is shown in the figure referred to, are non-respiratory and 

 thicker, and is undoubtedly attached along the dorsal median line 

 of this region of the lung where it (the lung) forms one cavity with 



oes.TTv. 



t,s&. 



oes. 



JL. C4?C^r^^^. 



^ 



B 



QEsopliageal and neiglibouviug muscles of Hrevlceps. 



A. Tliese muscles in situ without disturbance of adjacent structures, which are, 



however, not all included in the figure. 



B. A further dissection to show relation of oesophageal muscle to root of lung. 



Sff. Hyoglossus muscle. Il.cocc. Ilio-coccygeus. Il.l. llio-lumbaris. JH. Kidney. 

 Zi. Liing. ces. Qisophagus. ces.m. (Esophageal mnscle. P.h. Petrohj'oideus 

 jiosterior tertius. t.sc. Trausverso-scapularis. 



its fellow. So also of course is the muscle of the opposite side of 

 the body, and the two muscles can be raised here from the surface 

 of the oesophagus by pulling up the common cavity of the two 

 lungs just where it opens into the larynx. The attachment con- 

 tinues on to the cricoid cartilage of the larynx ("annulus" of 

 Wilder*) which forms in this Batrachian, as in so many others, a 



* Zool. Jahrb., Abth, f. Anat. ix. 1896, pp. 290 &c. ■ 



