FROM THE LONDON CLAY. 497 



form bodies on its surface, as are noticed in the descriptions 

 of the two preceding figures, several raised and slightly curved 

 lines pass perpendicularly along the stem and divide at inter- 

 vals, giving a scabrous appearance to that portion of the sur- 

 face where they occur. 



Fig. 4 is a round stem, two inches long and nearly half an 

 inch in diameter. On this specimen are seen the rudiments 

 of several branches, and in some parts furrows or depressions, 

 along which the branches appear to have passed after being 

 given off. 



Plate viii. fig. 1. — This extraordinary and beautiful frag- 

 ment is in a fine state of preservation. It is quadrangular, 

 nearly straight, and embossed with a number of anastomos- 

 ing branches, curiously built up of small oviform bodies.— 

 How much farther this fossil extended it is impossible to say, 

 as the broken ends are of the same diameter as the middle. 



Fig. 1 a. — A portion of the above magnified. 



Fig. 2 represents a fragment with similar branches to those 

 of the specimen in fig. 1, ramifying on a thin partly cylindri- 

 cal portion of the fossil. 



Fig. 3. — In the centre of this figure is a slender round stem 

 divided into two branches, which soon expand and become 

 flattened ; the terminations have been both broken off. At 

 the upper part is seen a transverse section, showing the inter- 

 nal structure of another portion. Tt is uncertain whether all 

 these parts belong to one and the same fossil. 



Fig. 4. — This specimen is of an oval shape, tapering at its 

 lower part into a kind of leaf-stalk. From its upper part on 

 the left side two branches are given off, and at the top is 

 the rudiment of a third. From the hardness of the matrix the 

 centre is not well shown. 



Fig. 5. — This fossil is curved backwards and to one side, 

 having a broad sulcus along the centre, which is partly filled 

 with hardened matrix. The inferior termination is rounded, 

 and inclines rather forward. The surface is covered with 

 small oviform bodies. 



Fig. 6. — Nearly flat, edges rounded, and slightly raised. — 

 On the upper part of the fossil is a projection on each side ; 

 from these projections the edges above and below slant in- 

 wards. At the upper termination is a small notch, the lower 

 one is imperfect. 



Fig. 7. — Oval, length one inch, breadth three quarters of 

 an inch. The centre of this fossil is shaped like a fan, owing 

 to a depression on each side. 



Fig. 8. — Oval, nearly flat, the surface thickly covered with 



Vol. III.— No. 34. 3 h 



