156 PROCEEDINGS COTTESWOLD CLUB 1908 
_IIL.—STRATIGRAPHICAL DISTRIBUTION OF THE 
ECHINOIDS 
In the Doulting-Stonesfield area, echinoids occur mainly 
along certain definite horizons. Those along which they 
may be said to occur abundantly are enumerated in the 
left-hand column of the following table ; and those along 
which they occur less frequently, in the right-hand 
column. 
TABLE II.—STATEMENT SHOWING STRATIGRAPHICAL 
DISTRIBUTION OF THE ECHINOIDS. 
ABUNDANT Less FREQUENT 
1. Rubbly Beds Upper Zrigonia-Grit (Garantiane) 
2. White Oolite Buckmani-Grit (post-discite) 
or Lower 7y7gonia-Grit (discite) 
Clypeus-grit Anabacta- Harford Sands (concavt) 
Limestones Oolite Marl (Bradfordensts) 
3. Clypeus-grit Lower Freestone (Wurchison@) 
or Scissum-Beds (scisst) 
Douiting Stone 
(Trueller) 
Upper Coral-Bed 
Lower Limestone and Pea-Grit 
(Murchison) 
In the “ Dorset” area, it may be remarked, there are 
very few records of echinoids from beds below those of 
Garantiane hemera: but above they are plentiful. 
Table III. gives a complete list of the echinoids which 
occur in the Inferior Oolite of the West of England. The 
horizons at which they have been found are indicated by 
a thick line; a broken line means that a species probably 
occurs, but has not yet been recorded; while a circle 
indicates that the species is fairly common. 
