82 BRITISH FOSSIL CORALS. 
and MM. irregularis,’ by the somewhat compressed form of its calice. It differs from 
M. caryophyllata, M. brevissina,’ M. pateriformis,‘ M. Guerangeri, M. Lotharinga,° 
M. Goldfussana, M. hippuritiformis, M. plicata,” M. pictaviensis," M. decipiens,” 
M. Guettardi,” M. cyclolitoides,” C. trouvillensis, by its numerous septa, whereas in the 
above-mentioned species there are only five cycla. The same character distinguishes it from 
M. detrita, M. inequalis,"’ M. sycodes," M. Stutchburyi,’’ M. luciensis,” and M. striatulata,” 
which have only four cycla. On the contrary, the septa are more numerous in J. trun- 
cata’ and in IZ. Lesueuri” than in AZ. dispar ; instead of six cycla, they constitute in 
general seven complete cycla. 
Six cycla are also’ met with in J. trochoides,* M. ponderosa, M. Beaumonti,” 
M. patellatas® M. subtruncata,” and M. dilatata” ; but M. dispar may be distinguished from 
M. trochoides® and M. Beaumonti by its general form, which is not so regularly conical as 
in these, by the apparent shallowness of its fossula and its large size. It is proportionally 
much taller than JZ. subtruncata and M. patellata, and its basis is far from bemg as broad 
as the calice, as is the case with the latter. J/. ponderosa is also much shorter than 
M. dispar, and its basis is quite convex. 
The general form of the corallum is also very different in most of the other species of 
this numerous group. ‘Thus, JZ. xwmismalis,” M. depressa,” M. lens,” M. Delabechii,® 
1 Milne Edwards and J. Haime, Ann., 1. ¢., p. 298; Anthophyllum dispar, Michelin, Icon., pl. xe, fig. 6. 
2 Lamouroux, Exp. Meth. des Genres de Pol., pl. Lxxix, figs. 8, 9, 10. 
3 Milne Edwards and J. Haime, |. ¢., p. 293, 
4 Anthophyllum pateriforme, Michelin, Icon., pl. xe, fig. 3. 
5 Milne Edwards and J. Haime, 1. c., p. 293. 6 Tb., p. 294. 7 Ib. 
8 
Turbinolia hippuritiformis, Michelin, Icon., pl. Lxix, fig. 
Bllipsosmilia plicata, D’Orbigny, Prod., vol. ii, p. 30. 
10 D’Orbigny, Prod., t. i, p. 292. 
Anthophyllum decipiens, Goldfuss, Petref., tab. Ixix, fig. 3. 
% Blainville, Dict. Sc. Nat., t. Ix, p. 302. 
3 Thecophyllia cyclolitoides, Milne Edwards and J. Haime, |. ¢., p. 242. 
1 D’Orbigny, Prod., t. i, p. 384. 
13, Anthophyllum detritum, Michelin, Icon., pl. x, fig. 1. 
“I 
Anthophyllum inequale, Michelin, Icon., pl. xe, fig. 4. 
7 Milne Edwards and J. Haime, 1. ¢., p. 299. 
18 Tab. xxvii, figs. 3, 9. 
19 D’Orbigny, Prod., t. i, p. 321. 
20 Caryophyllia striatulata, Michelin, Icon., pl. xe, fig. 9. 
Caryophyllia truncata, Defrance, Dict. Se. Nat., vol. vii, fig. 198. 
Milne Edwards and J. Haime, 1. ¢., p. 297. 23 Ib., p. 299. 2A biapacie: 
Thecophyllia Beaumonti, Milne Edwards and J. Haime, p. 243. 
Anthophyllum patellatum, Michelin, Icon., pl. xe, fig. 2. 
27 Caryophy llia truncata, Lamouroux, Exp. Meth., pl. Ixxvii, fig. 9. 
Caryophyllia dilatata, Michelin, Icon., pl. xvii, fig. 4. 79 Tab. xxvi, figs. 2, 4. 
80 D’Orbigny, Prod., t. i, p. 321. %! Tab. xxix, fig. 5. 82 Tab, xxvi, fig. 7. 33 Tab. xxvi, fig. 5. 
