CORALS FROM THE INFERIOR OOLITE. 129 
Genus MONTLIVALTIA, (p. XXV.) 
1. Monriivattia TRocHopEs. Tab. XXVI, figs. 2, 2a, 3, 3a, 10; and Tab. XXVH, 
figs, 2, 2a, 4. 
MoNTLIVALTIA CARYOPHYLLATA, Bronn, Leth. Geogn., tab. xvi, fig. 17, 1836. 
—_ TRocHoIDES, Milne Edwards and J. Haime, Ann. des Sc. Nat., s. 3, vol. x, 
p. 299, 1848. 
Corallum simple, turbinate, rather tall, and in general straight, but varying much as to 
proportions. Basis obtuse in some specimens; subpedicellate in others. Lpitheca thick, 
wrinkled, and extending to a short distance from the calicular edge. alice circular, or 
sometimes oval and shallow; the fossula small and circular, or somewhat oval. No 
columella, Septa forming in adult specimens five complete cycla, and often an incomplete 
sixth cyclum in one half of some of the systems; those of the second cyclum as large as 
the primary ones, and differing but little from the tertiary ones; those of the last cyclum 
very small, All these septa are thin, closely set, straight, or nearly so, somewhat granulose 
laterally, and terminated by a delicately crenulated edge. Height of the corallum in 
general about one inch and a half ; and diameter one inch two or three lines. 
Found in the Inferior Oolite at Charleomb, by Mr. Walton. A specimen of the same 
species, belonging to the collection of the Museum in Paris, is catalogued as having been 
found in Germany. 
Montlivaltia trochoides much resembles the species for which this genus was established, 
the MZ. caryophyllata ;\ but it differs from it by the septa being thinner, and in general 
more numerous, and more especially by its epitheca extending almost to the edge of the 
calice ; whereas in Jf. caryophyllata this mural tunic ends at a considerable distance 
below that margin. It may be easily distinguished from Jf. lens,’ AZ. Delabechii,’ and 
M. depressa,‘ which are all of a discoidal form, by its being much taller than broad ; from 
M. Waterhousei® and M. reguiaris,® by its basis not being regularly convex; and from 
M, Smith’ and M. cupuliformis® by not being fixed by a broad basal surface, and having 
thinner septa; and from I. deltoides, M. rudis,° M. cornucopia,” M. bilobata,” and 
M. irregularis,’® by the circular form of the calice, which in all the latter is more or less 
1 Lamouroux, Exposit. Method. des Polyp., tab. Ixxix, figs. 8, 9, 10. 
Tab. xxvi, fig. 7. 3 Tab. xxvi, fig. 5. 4 Tab. xxix, fig. 5. § Tab. xxvii, fig. 7. 
6 D’Orbigny, Prod., vol. i, p. 346. 7 Tab. xxi, fig. 1. 8 Tab. xxvii, fig. 1. 
9 Milne Edwards and Haime, Ann. des Sc. Nat., s. 3, vol. x, tab. vi, fig. 3. 
Cyathophyllum rude, Sowerby, Geol. Trans., 8. 2, vol. ii, tab. xxxvil, fig. 2. 
Milne Edwards and J. Haime, loc. cit., p. 298. 
Turbinolia bilobata, Michelin, Iconogr., tab. Ixii, fig. 1, (not tab. 1xi, fig. 7.) 
13 Milne Edwards and J. Haime, loc, cit., p. 298. 
to 
Li 
