928 



MR. F. E. BEDDARD ON THE AKATOMY 



[Dec. 15, 



for displaying the structures in question. The preservative 

 alcohol had hardened the hearts and the surrounding tissue in 

 such a way as to render them very tough and had decolorized the 

 hearts, while rather deepening the yellow of the fat-mass. It 

 was thus found convenient to cut through with a pair of scissors 

 the fat-mass of the left side of the body along a line presumed to 

 pass through the hearts. Text-figure 190 shows that this was 

 successfully accomiDlished, and represents the two sides of the cut 

 whereby the mass of fat and the contained lymph-hearts were 

 divided longitudinally. 



Text-fi2-. 190. 



Iliac fat-body of JCenopiis Icsvis cut longitudinally into two halves to show- 

 cavities of lymph-hearts. 



This longitudinal section passed, I believe, very nearly through 

 the middle of each lymph-heart. It will be seen that they are not 

 all of them of exactly the same size, though the differences between 

 them are not very great. In the dissection (text-fig. 189, p. 927) 

 of the hearts on the right side of the same Frog it will be noted 

 that the last of the three hearts is considerably the largest of the 

 three, perhaps twice as large as either of the others. This did 

 not appear to be the case on the left side of the body. What is 

 particularly striking about these hearts when seen evenly divided, 

 and in section, is the great thickness of their walls. This is not 

 exaggerated in the drawing to which reference has been made. 

 The dissection of the corresponding hearts on the opposite side 

 of the body (text-fig. 189) of this specimen shows the apertures in 

 the walls of the hearts which presumably admit lymph into their 



