350 



MR. F. E. BEDDARD ON THE ANATOMY 



[Apr. 9, 



is more marked in Megaloplirys than in either Pelohates or Rana. 

 The pylorus is situated a little way beyond the lowest point 

 of the U formed by the stomach and the duodenum and is 

 marked externally by a raised annular fold. 



§ Ovaries and Oviducts. 



The whole abdominal cavity of this Frog was filled with eggs 

 which were not contained within the oviducts, but in the ovaries 

 themselves. The lobes of the ovary packed tightly with ripe ova, 

 among which were immature ova, were polygonal through mutual 



Text-fia-. 100. 



OK 



-o.d^. 



Oviduct oi Megalophrys nasuta. 



o.d. Dilated lower part of oviduct, ov. Ovary, m. Muscular band attaching 

 ovary to caecum of oviduct. 



pressure. The mesovarinm which joins the mesocolon is rema,rk- 

 able for the fact that posteiiorly its margin is sti-engthened by a 

 thick and strong band of muscular fibres. I could not observe 

 any structure of this kind in Rana guppyi in the same region. 

 This band of muscles in Megalophrys is shown in the accompanying 

 figure (text-fig. 100). It will be there seen that it is broken up 

 into wider and narrower strands of }nuscle, which are partly con- 



