18 BRITISH FOSSIL CORALS 



growth. They do not remain long united after fissiparity and budding, and they form 

 an aggregate of rather short tubes which are not united by a common epitheca. 



The epitheca of each corallite is dense and marked with lateral lines, but it is usually 

 worn off here and there so as to show the costge which are delicate, straight, numerous, 

 and subequal. 



The calices are usually slightly elliptical and the epitheca reaches to them. They are 

 not of greater diameter than the corallites. 



The septa are few in number and probably do not attain the full complement of the 

 fourth cycle. The primary septa are the largest, but in some calices the secondary equal 

 them in size. 



The columella is rudimentary. 



Length of calices ^ inch (largest). Height of corallite 2 inches. 



Locality. Cricldey. Inferior Oolite. 



In the Collection of Dr. Wright, F.G.S., Cheltenham. 



2. Thecosmilia gregaria, M'Coy, sp. PL VI, figs. 1 — 4. 



This common species appears to vary greatly in some districts, and Dr. Wright, of 

 Cheltenham, has a series which appears to gradate towards and into the genus Symphyllia. 

 The figures explain this tendency, but the calices of fig. 1 are rather too much levelled 

 internally. Fig. 2 represents the calices on the outside of the corallum. 



Locality. Crickley. 



In the Collection of Dr. Wright, F.G.S., Cheltenham. 



Genus — Latimjeandra, Ed. 8f H. 



1. Latim^andra Flemingi. Ed. 8f H. PI. V, figs. 6, 7. 



A fine specimen of this Lower Oolite form is delineated in plate V. The magnified 

 view (fig. 7) shows a calice in which gemmation has taken place very remotely from the 

 centre. Many portions of the corallum do not present serial calices, and if such fragments 

 were found separate they would necessarily be associated with the genus Lsastraa. The 

 Latimaandra may be regarded as modified Isastraa ; but most probably they descended 

 from Thecosmilia. 



