CORALS FROM THE GREAT OOLITE. 105 



Family ASTREID^, (p. xxiii.) 

 Genus Stylina, (p. xxix.) 



1. Stylina comfera, Tab. XXI, figs. 2, 2a. 



Gemmastrea limbata? M' Coy, loc. c\i., p. 419, 1848. 



CoralJmn composite, massive, tall, very convex, and subgibbose. Corallites free at 

 their upper end, where they assume the form of a truncate cone ; more or less prominent, 

 and sometimes rather crowded. Costa closely set, straight, almost lamellar, thick, pro- 

 jecting more or less alternately, and terminated by an almost entire obtuse edge. Calices, 

 in general, regularly circular ; sometimes slightly compressed, elevated, and containing a 

 small, shallow, round fossula. Columella styliform, but very small, and seldom projecting 

 enough to be easily seen at the bottom of the fossula. Septa forming six equally 

 developed systems, and two complete cycla; in general, no indications of septa corre- 

 sponding to the third cyclum of costse. The six primary septa are well developed ; the 

 secondary ones less so ; they are all exsert, thick, straight, terminated by a strongly arched 

 edge, and slightly granulated laterally. The calices often project above the common 

 surface of the corallum to the distance of one line and a half j their diameter is not quite 

 one line. 



S. conifera was found near Bath : we have seen two well-preserved specimens of this 

 species ; one was given to us by Mr. Pratt, the other belongs to the Geological Society. 



We are inclined to think that a fossil found at Minchinhampton, and considered by 

 Prof. M'Coy^ as specifically identical with the Astrea limbata of Goldfuss", may belong to 

 this species ; but A. limbata differs from it, by being a ramose Styl'uia, and having a longer 

 columella and larger calices. 



S. conifera may easily be distinguished from most species of the same genus by its 

 strongly prominent calices, and by their very unequal size. 



2. Stylina solida, Tab. XXII, figs. 3, 'Za, 3^. 



Stylopora solida, M'Coy, Ann. of Nat. Hist., s. 2, vol. ii, p. .'399, 1848. 

 Stylina Babeana, B'Orbiyny, Prod., t. i, p. 292, 1830. 



— — Milne Edwards and J. llaime. Polyp. Foss. des Terr. Palseoz,, etc., 



p. .59, 18.)1. 



' Gemmastrea limbata, M'Coy, Ann. of Nat. Hist., s. 2, vol. ii, p. 4 1 3. 

 2 Petref. Germ., t. i, tab. viii, fig. 7, and. tab. x.x.:cviii, fig. 7. 



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