190f.] OF A FROG OF THE GENUS MEGALOPHRYS. 343- 



the semitendinosns (that is of course when the thigh is inspected 

 from the inside), passes below it. The arrangement is thus the 

 precise reverse of that which characterises Rana. 



The /Semitendiuosus is then quite a superficial muscle on the 

 inside aspect of the thigh, visible for practically its whole extent 

 without dissection. In liana it is covered not only by the graciles 

 but by the adductor. The semitendinosus may be termed a 

 two-headed muscle, but there are traces of further subdivision at 

 the origin from the symphysis. The lower (posterior) half of the 

 muscle arises by two closely contiguous heads and is to some 

 extent overlapped by the gracilis major. It ends at about the 

 end of the second third of the femur in a stout tendon which is 

 continuous with the insertion on to the inside of the leg below 

 the knee. The anterior half of the muscle is inserted on to this 

 tendon soon after it is established. There is no common fleshy 

 origin with any part of the adductor mass such as occurs in Rana. 



Unless the anterior head of the semitendinosus is to be 

 regarded as its equivalent, thei^e is no Sartorms muscle. It is 

 important to notice that in the absence of a sartorius and in the 

 superficial semitendinosus, Megaloplvrys not merely differs from 

 Rana but agrees with Pijm*. 



§ The Lungs and the " Diaphragm." 



The Limgs of this species are not much less in size than those 

 of the huge female Rana gujypyi. The suspensory ligaments 

 appear, however, to be rather different and more complex. I shall 

 give some account of them rather as a basis for future comparison, 

 since but little seems to be known concerning these and other 

 peritoneal folds among the Bati'achia. Anterior]}^ the right lung- 

 is not in actual contact with the right lobe of the liver ; there is 

 a definite and rather broad pulmo-hepatic ligament, such as is 

 plain in Rana g%uppy%. This ligament runs back and at the end 

 of the liver-lobe becomes continuous with the postcaval vein. 

 It is more extensive than as well as i-ather different from the 

 corresponding ligament in Rana guppyi. and, as will be seen 

 presently, extends much further along the lung. This pulmo- 

 hepatic and afterwards pulmo-caval ligament is attached to the 

 edge of the lung mesiad. It does not end posteriorly in a 

 crescentic free edge as such ligaments often do. It riins as far 

 as the beginning of the kidney and then bends round and 

 becomes continuous with a ligament attaching the dorsal surface 

 of the lung to the oviducal ligament and so to the dorsal body- 

 wall. There is thus a continuous U-shaped line of attachment, 

 and this traverses the lung nearly from end to end. There is 

 thus a similarit}^ to the conditions observable in most Lizards 

 where there is both a pulmo-hepatic and a dorsal pulmonary 

 ligament. " It may be noted," observed Mr. Butler, who first 

 contrasted t the Teiidee, which do not possess the pulmo-hepatic, 



* P. Z. S. 1895, p. 838. f P- Z. S. 1889, p. 465 footnotp. 



