PLATE 38, 39, 40, 41. 
ORTHOCERATiT^ and Other remains, black marble , 
COMMON LIMESTONE AND SPAR. 
P. 38 — FIG. 1 , 2 . 
CONCHYLIOLITHUS N. OrthoceraTites (Ges- 
neri ) elongatus conicus longitudinaliter sulcatus, 
dissepimentis integerrimis. S. p. 
A petrified shell. Original a Nautilus. Elongated, straight, 
(see Syst. Gen. 6. Fam. Naut. d. Orlhoceratita:) conical, and 
longitudinally furrowed ; the furrows equal, regularly con- 
cave, and close. Dissepiments very entire, approximate, or 
at no great distance from each other. The structure and 
situation of the siphuncle uncertain. 
Found in the black marble, near Ashford, and, in other 
places, in common grey limestone, but less frequently than 
a succeeding species of the same tribe. 
Fig, 1. A specimen somewhat compressed, consisting of 
black marble, the surface partially covered with white spar. 
2. A smaller specimen in white limestone, perfectly 
round and conic ; but, in a very small degree, bowed or 
bent towards one side. 
s 
