132 BRITISH FOSSIL CORALS. 



M. Smithi, but in this latter species the septa are more unequal, and the basis is broadly 

 adherent; in all others the septa are either more numerous and thinner, or, on the 

 contrary, less numerous and thicker, and in no other have we met with any large septa 

 belonging to the fifth cyclum. 



5. MONTLIVALTIA CUPULIFORMIS. Tab. XXVII, figs, I, \a. 



CoraUum tall, straight, adherent by a very large basis, above which it is slightly con- 

 stricted, but soon becomes almost cylindrical. Epitheca extending high up towards the 

 calicular margin, but almost entirely worn away in the specimen here described, Calice 

 cucular ; central fossula very small, somewhat oblong. Sej)ta rather thin, straight, and 

 forming four well-developed cycla, and a rudimentary fifth cyclum ; those of the second 

 cyclum as large as the primary ones. Height of the corallum one inch and a half. 

 Diameter of the calice one inch. 



This fossil, of which we have seen but one specimen, was found in the Inferior Oolite 

 at Dundry, by Mr. Pratt. 



Most of the various species of Montlivaltia, which, like M. cujpuliformis, are adherent 

 by a broad basis, differ from it by their general form as well as by characters derived from 

 the septa. Thus M. Smithi} and M. pater if ormii are broader than high, and have thicker 

 septa. M. detritc^ and M. incBqualis^ are entirely cylindrical, without any constriction 

 near the basis, and have very thick septa. M. striatulata^ is a very small coral with very 

 delicate septa ; M. subtruncata^ has six cycla of septa ; and M. LemeurP seven cycla. M. 

 Goldfussiana^ resembles most the above-described fossil by its general form, but is more 

 turbinate, and presents a greater number of septa. 



6. Montlivaltia Delabechii. Tab. XXVI, figs. 5, Sa, 53. 



Montlivaltia decipiens, M'Coy, Ann. and Mag. of Nat. Hist., s. 2, vol. ii, p. 419, 1848 ; 



(not AnthophTjUum decipiens, Goldfuss.) 



Corallum free, very short, almost discoidal, circular ; its inferior surface slightly concave, 

 and presenting a small central cicatrix, indicating its original point of adhesion. Epitheca 



1 Tab. xxi, fig. 1. 



2 Anthojihyllam patiriforme, Michelin, Iconogr. Zoopli., tab. 1, fig. 3. 



3 Anthophyllum detritum, Michelin, Iconogr., tab. x, fig. I. 

 * AnthophyUmn inequale, Miclielin, op. cit., tab. 1, fig. 4. 



^ Caryophyllia striatulata, Michelin, op. cit., tab. J, fig. 9. 

 " Lasmophyllia subtruncata, D'Orbigny, Prod, de Paleont., vol. i, p. 321. 

 7 Milne Edwards and J. Ilainie, Ann. des Sc. Nat., s. 3, vol. x, p. 257. 

 ^ Milne Edwards and J. Hainie, loc. cit., p. 294. 



