| OCR Text |
Show 842 MR. P. E. BEDDARD ON THE [Dec. 3, the base of lung behind it and then curves back on the anterior face of the lung, where it opens. The various membranes which in Xenopus connect together the lung with the oviduct, and the lung with the stomach, and each of them with the parietes, form a closed sac lying beneath the stomach. The proximal section of the oviduct lies on the outer wall of this sac. As in Pipa, the heart and pericardium are enclosed in a membranous sac. W e now come to the diaphragm, by which I understand the muscles which are particularly related to the lung and oesophagus, Fig. 1. Interior of abdom inal cavity of Xenopus. L, lung ; m.p, musculus pulmonum proprius ; a, branch of obliquus internus ; gl, glutasus. The muscular fibres are, as in Pipa, derived from three sources:- (1) There is first of all a special muscle whose main concern is with the lungs and oesophagus. This is, I believe, not merely the analogue, but the homologue of the " musculus pulmonum proprius" as Mayer termed the muscle which I have illustrated in figs. 1 and |
