86 BRITISH FOSSIL CORALS. 
high. Each corallite usually attains the length of about one inch and a half before 
dividing, and the diameter of the simple calices is in general about eight lines, but the 
compound calices are often double that size. 
We have examined a great number of specimens of Zhecosmilia annularis found at 
Steeple Ashton, Wiltshire. Most of these fossils belonged to the collections of the Museum 
of Practical Geology, the Geological Society, the Bristol Museum, the Paris Museum, 
Mr. Bowerbank, Mr. Phillips, Mr. Stokes, and Mr. Pratt. 
The same species is met with at Slingsby in Yorkshire, and we also refer to it a fossil 
found at Malton, and belonging to Mr. Bowerbank’s collection, which resembles much the 
specimen figured by Mr. Phillips, but is not m a state of preservation sufficiently good to 
enable us to be certain as to its specific characters. W. Smith, who gave some good 
figures of this coral in his remarkable work on ‘ Organic Remains,’ mentions it as having been 
found in the following localities: Longleat Park, Stratton, Ensham Bridge, Wotton Basset, 
Bamner’s Ash, Well near Swindon, Wilts and Berks Canal, Shippon, Bagley Wood Pit, and 
Stanton, near Highworth. My. Phillips also points out its existence at Seamer. We must 
add that some specimens found at Radcliff by the collectors of the Geological survey, and 
communicated to us by Sir H. De la Beche, do not appear to differ from the above-described 
species, but some other fossils from the same locality appear to be more similar to the 
Montlivaltia Lesueurt from the Kimmeridge clay near [avre. 
The well-preserved specimens which we have met with in some of the English collec- 
tions enable us to rectify, concerning Zhecosmilia, an error of the same kind as that we 
formerly fell into with respect to Montlivaltia. he septa ave not terminated by an undi- 
vided edge, as in the tribe of Husmiline, where we placed this genus when the first part 
of this Monograph was published; they are denticulated m a regular manner, and the 
Thecosmilia may be briefly defined “ compound Montlivaltia.” 
This generical division contains fossils belonging to cretaceous as well as jurassic 
formations, and we are also inclined to admit in it some fragments of corals found in the 
celebrated fossiliferous deposit at St. Cassian. We have given the list of all these species 
in the synopsis joined to our Monograph of the Paleozoic corals, but we regret not having 
had an opportunity of examining some of them, and others that have of late been submitted 
to our investigation were in a very bad state of preservation ; much uncertainty, therefore, 
still exists respecting the specific character of many Zhecosmilia. However, the fossil 
above described is easily recognisable by the unequal size of the calices, which take their 
origin on the same stem and are of the same age, and by the form of the sepfa. Thus, 
7. Konincki,‘ a species of which we have only seen a young specimen, differs from 7! 
annularis by its septa being thinner, and more equal in size. In 7. trichotoma’ and 
T. lobata’ the calices are almost circular, smaller, and placed on the same level. 7. sem- 
1 Milne Edwards and J. Haime, Ann. Sc. Nat., 3"° ser. vol. x, p. 272. 
2 Lithodendron trichotomum, Goldfuss, Petref. Germ., pl. xii, fig. 6. 
® Lobophyllia lobate, Michelin, [con., pl. Ixvii, fig. 3. 
to 
