54 
Mr. Parkinson’s Remarks on Fossils 
These are easily found in this chalk, their texture being 
rendered visible by a ferruginous tint given to their 
remains. On immersing in very dilute muriatic acid, 
such parts of this chalk as exhibit, when fresh 
broken, a rough and granular appearance, a floccu- 
lent membranous substance is separated, of sufficient 
tenacity to hang from the chalk for the length of 
one-sixteenth of an inch. 
There are various bodies in this bed, which cannot be regarded either as 
alcyonia or as sponges, but appear to be allied to them. 
Sponges 1 
Alcyonia / 
Fossils of the Chalk with few Flints. 
Vertebrae and bony palates of fishes. 
Nautilus Species large, but not distinguishable. 
Ammonite Species large, but not distinguishable. 
Teredo ? annularis . . . New species. Shell spiral at one extremity, having 
the spires detached. As it enlarges towards the 
other extremity it becomes slightly bowed, and ends 
in a straight subcylindrical tube. Shell thick to- 
wards the spiral end, and thin towards the other. 
At the distance of every quarter of an inch along the 
shell there are annular risings, the depressions be- 
tween being smooth, and rising with a circular sweep 
towards each rising. In its fine spathose substance 
the shell more resembles a teredo than a serpula, 
Plagiostoma spinosa . , The shell, in this bed, often retains some of its original 
colouring. 
p ecten In fragments, too imperfect to allow of distinction. 
Inocerami Same as in the two former beds. 
