554 Mr. W, S. Mac le ay's Anatomical Observations 



Tab. XX. 



Fig. 1. Dendrodoa ghndaria seen on the right side, and of the 

 natural size. The base encrusted with pebbles has the 

 appearance of the cup of an acorn. 



Fig. 2. Dendrodoa glandaria seen obliquely, so as to show the 

 top, which is a little compressed, and exhibits four points. 

 The two lowest and largest are false orifices ; the two 



ff;i smallest (which are indeed so small as to be almost invi- 



[;;fi{'>/ sible to the naked eye) are the real orifices, the highest 

 being the anal and the other the branchial orifice. 



Fig. 3. The two false apertures of Dendrodoa glandaria, much 

 magnified, and forming a triangle with the branchial 

 orifice. 



C. Branchial orifice. 



iW'i.'f ,' c. False aperture, possibly accidental, and consist- 



r.'' ing of a circular cavity containing a mamil- 



lated eminence, 

 c. Aperture, supposed to be accidental. 



Fig. 4. Dendrodoa glandaria of the natural size, but compressed 

 - ' ■■;■ between the fingers, so as to show on the left side the 

 branched form of the only ovar}'^. 



Fig. 5. Highly magnified view of the interior of Dendrodoa glan- 

 daria when exposed by a vertical section of the envelope 

 through part of the left side and the whole of the right. 

 The top being thrown back, we perceive the internal ap- 

 pearance of the branchial orifice surrounded by its simple 

 tentacula and communicating with the branchial pouch, 

 of which sufficient has been left to show the nature and 

 beauty of the net- work. Behind this net- work and ad- 

 hering to the mantle we see the left ovary unique and 

 ramose. The stomach striated with folds, and the intes- 

 tine are seen lying parallel to each other at the lowest 



.afiT part 



