38 



Lime — see the outlines near the bottom of the plate — often 

 having the facets, as on the outline below, mostly convex 

 and rounding, and sometimes bending round or enwrap- 

 ping the case like the left hand figure. This specimen has, 

 in common with others, the granules that betray the Bath 

 Limestone, tab. 8, and the partly Stalactitical Lime, as 

 in tab. 1, of a very white colour, and paper-like form — 

 see the middle figure of the second row from the bottom of 

 the plate — or with the fibrillce*, some tolerably distinct, 

 and others very minute and very beautiful ; these often re- 

 semble worms, and we occasionally find the remains of 

 true Serpulce, or a kind of worm -shell like those often 

 found on oysters. 



The large upper figure evidently shows great variety of 

 casts ; the Madrepore often forms six cordate appearances 

 placed star-wise, with or without a column, and other 

 whimsical deceptive appearances. The Mytilus has its 

 dwelling among these, its case is variously ornamented with 

 them, either as stars which are the ends of the Corals, or 

 as stricB, which are the sides of them. Within one of the 

 coats the hinge end of the Muscle is very distinct. The 

 Muscles are occasionally larger. The specimen below shows 

 a number of smaller ones in a smaller Coral. Both these 

 specimens came from Calne. The lower bottom figure was 

 taken out of a Steeple-Ashton turbinated Coral, the shell 

 having the strice and appearance of a fresh bivalve. The 

 next figure is from one taken out of the small specimen, 

 magnified ; and the left hand one is a cast of Carbonate of 

 Lime, such as is found within the shells, which determine 

 them to be Mytili. This is covered with an Ochre, as are 

 most of the specimens of Corals from Steeple-Ashton. 



* These, Mr. Parkinson thinks, argue against the stellated appearances 

 being the remains of Coral casts; they are partly Stalactitical, produced since 

 the formation of the Coral, and partly the casts of minute worm-holes. 



