INTRODUCTION. XXXVI 
50. Genus Dipioria. 
Milne Edw. and J, Haime, Comptes rend., t. xxvii, p. 493, 1848. 
Corallum glomerate, adherent by a broad basis, and of a dense structure. Gyr? long 
very sinuous, and united by highly-developed costa, and not by the walls themselves ; 
ridges complex, presenting on each side a mural crest, and m the middle a broad concaye 
groove or ambulacrum, formed by the coste and their dissepiments. Co/umella spongy, 
ES ntial and well developed. Septa strong, exsert, and armed with closely-set teeth, 
the largest of which are near the walls, 
Typ. sp., Diploria cerebriformis, Milne Edw. and J. Haime, Ann., t. xi, p. 289 ; Meandrina cerebriformis, 
Lamarck, op. cit., vol. ii, p. 246; Seba Thes., vol. ili, tab. exii, No. 6. 
51. Genus Luprorta. 
Milne Edw. and J. Haime, Comptes rend., t. xxvii, p. 493, 1848. 
Corallum glomerate, of a light spongy structure. Gyri very long, and limited by 
their walls, which are thin or cellulose, and form simple intercalicular ridges, Columella 
lamellar ; its upper edge projecting slightly, and regularly lobated. Sepfa united to the 
columella by means of “marginal trabicule ; their upper edge slightly exsert, and armed 
with very small irregular teeth. Plate covered with a thin but complete common epitheca. 
Typ. sp., Leptoria tenuis, Milne Edw. and Haime, Ann. des Sc. Nat., 3° ser., vol. x, tab. viii, fig. 11 ; 
Meandrina cerebriformis, Quoy and Gaimard, Voy. de I’ Astrol., Zooph., pl. xviii, figs. 2,3; Meandrina tenuis, 
Dana, op. cit., p. 262; Milne Edw., Atlas du Régne An. de Cuvier, Zooph., pl. Ixxxiv ter, fig. 2. 
52. Genus Catoria. 
Milne Edw. and J. Haime, Comptes rend., t. xxvii, p. 493, 1848. 
Corallum resembling much the true Meandrina, but differmg from the four preceding 
genera by its rudimentary co/wmel/a, which is not essential, but septal, and formed by 
trabicule, springing from the margin of the septa. G@yrz long, and united by their walls, 
the tissue of which is cellular; ridges simple and continuous. Sepa delicate, and having 
neither a paliform lobe nor a lateral expansion near the columella. 
Typ. sp., Celoria labyrinthica, Milne Edw. and J. Haime, Ann. des Se. Nat., 3° série, t. xi, p. 194; 
Madrepora labyrinthica, Ellis and Solander, op. cit., tab. xlvi, figs. 3, 4. 
53. Genus ASTRORIA. 
Milne Edw. and J. Haime, Comptes rend., t. xxvii, p. 493, 1848. 
Corallum having the same structure as in the preceding genus, but formed of very short 
gyri, the corallites “tending to individualization. This form is intermediate between the 
ordinary confluent Astr eidee (or Meandrinz) and the agglomerated Astreidee, such as true 
Astrea. 
Typ. sp., Astroria dedalea, Milne Edw. and J. Haime, Ann. des Se. Nat., t. xi, p. 297; Madrepora 
dedalea, Ellis and Solander, op. cit., tab. xlvi, figs. 1, 2. 
