1908.] 



OF THE BATRACHIAN GENUS HEMISUS. 



919 



to another membrane lying beneath and rather in front of the 

 fat-body and partly covered over by the strap-shaped cutaneous 

 muscle ah^eady in part described. 



\ ''' 



\ \ 



Saccus iliaciis oi Hemisus guttatum. 



The fat-body (/ ) lias been pushed over to the left; strands of connective tissue 

 uniting it with the walls of the sac are shown. 



s. Anterior septum of lymph-sac. 



This membrane bounds the cavity below, and when it is cut 

 through (as is shown in text-fig. 184, c, p. 920) the obliquus muscle 

 is exposed ; but as the membrane is quite free of the muscle it would 

 seem to be really the dorsal wall of a subsidiary sac lying on the 

 obliquus. It seems to me to be clear that this lai-ge sac, almost 

 filled up by the fat-body already described, and in wdiich also 

 lies— as will be described presently— the lymph-heart, corresponds 

 to the saccus iliacus of the Frog, Rana esculenta. Furthermore, 

 the muscular slip which I have referred to as traversing the sac 

 in Hemisus near to its anterior w^all appears to me to be probably 

 the musculus cutaneus iliacus of Rana. This sac and the muscle 



