INTEGUMENT. 



21 



III. Integument. 



The integument of the Bcaudata differs from that 

 of other Batrachians in the slight attachment to the 



Fig. 8. 



Rana temporaria, showing the dermal attachments and the dis- 

 position of the lymph- sacs, upper and lower views. The position 

 of the lymph-hearts is indicated by asterisks. 



a. Abdominal sac. 



b. Brachial ,, 



c. Crural „ 



d. Dorsal ,, 

 /. Femoral „ 



g. Gular sac. 



if. Interfe moral .. 



I. Lateral ,, 



p. Pectoral ,, 



sb. Subbrachial sac. 

 sbp. Subplantar ,, 

 sf. Supra-femoral ,, 

 sp. Supra-plantar ,, 



muscles, thus rendering the skinning of a frog a most 

 easy operation. But the body is not enclosed in a 

 loose sac, as is often stated in popular descriptions ; 

 there are definite lines of attachment (Fig. 8) by 

 means of connective tissue, which form the demarca- 



