552 Mr. W. S. Macleay's Anatomical Observations 



E. Fragment of envelope. 

 K. Right ovary. 

 k. Left ovary. 



O. CEsophagus entering into the branchial pouch, 

 ~t-^ immediately behind which is the pharynx. 



L. Liver coating the stomach. 

 I. Intestine. 

 R. Rectum. 

 . o,^j i H. Anus. 



Fig. 5. One of the tentacular filaments of the branchial orifice 

 highly magnified. 



Tab. XIX. 



Fig. 1. Cystingia Griffithsii, seen on the right side, and of the na- 

 tural size. The translucid nature of the envelope permits 

 us to see the position of the stomach, heart, and left ovary. 

 The pedicle is encrusted at the base with minute grains 

 of sand. 

 Fig. 2. Cystingia Griffithsii magnified, and seen on the left side. 

 The transparency of the external envelope permits us to 

 see the external arch of the dorsal sulcus, and the pointed 

 internal arch touching the former at a point where there 

 is a lateral orifice. Immediately below this we see the left 

 ovary through the transparent envelope, and a little on 

 one side is that dark-coloured nodule, which on dissec- 

 tion appears to be contained in a pouch. 

 C. Branchial orifice. 

 A. Anal orifice. 



S. Grains of sand that externally encrust the thick 

 end of the pedicle. 

 ^'ig. 3. Outline of the Cystingia Griffithsii much magnified, to 

 show the various parts in situ on a portion of the right 



side of the envelope being removed. 



A. Anal 



