INTRODUCTION. XIX 
Aberrant Group. 
PSEUDOTURBINOLID i. 
Corallum simple, with the loculi open and devoid of synapticule or dissepiments, as in 
Turbinolide, but having the septa represented by groups of three vertical lamine, not 
adhering together, excepting near their external margin, where they are united by a common 
costa; a mode of structure, which is quite anormal in the whole order of Zoantharia. 
Genus DasMtia. 
Milne Edw. and J. Haime, op. cit., p. 328, 1848. 
Corallum subturbinate, and appearing not to be free. Septa strongly granulated. Coste 
thick, equal, not numerous, and separated by deep grooves. 
Typ. sp., Dasmia Sowerbyi, Milne Edw. and J. Haime, loc. cit., tab. vii, fig. 8 
Family I. 
OCULINID. 
Corallum composite, produced by gemmation, and presenting in general an abundant, 
compact ccenenchyma or common tissue, the surface of which is smooth, delicately striate 
near the calices, or slightly granular, but never echinulate. Walls of the corallites com- 
plete (that 1 is to say, presenting no perforations), not distinct from the ccenenchyma, and 
increasing by their internal surface, so as to invade progressively the inferior part of the 
visceral cavity, and to fill it wp more or less completely mm old age. Loculi imperfectly 
divided by a few dissepiments ; no synapticulee. Sepa entire, or having their upper edge 
slightly divided. 
§ 1. Septa of various sizes, forming distinct cycla. 
1. Genus OcuLIna. 
(Pars) Lamarck, Hist. des An. sans Vert., t. li, p. 283, 1816; Milne Edw. and J. Haime, Comptes 
rend. de l’Ac. des Sc., t. xxix, p. 68, 1849. 
Corallum in general arborescent ; gemmation irregular or affecting a spiral disposition ; 
coenenchyma highly developed ; its surface smooth, excepting near the calices, where it 
presents slight radiating strive. Corallites with the calice very deep; a columella well 
developed, papillose at its apex, and becoming compact towards its basis. Pa// corresponding 
to all the septa, excepting those of the last cyclum. Sepfa almost entire, slightly exsert 
I Rane L oN , 
and very unequally developed. 
Typ. sp., Oculina virginea, Lamarck, An. sans Vert., p. 289 ; Madrepora virginea, Ellis and Sol., tab. xxxvi. 
2. Genus TRYMHELIA. 
Milne Edw. and J. Haime, Comptes rend. de l’Académie des Sciences, t. xxix, p. 68, 1849. 
Corallum arborescent, differmg from Oculina by the non-existence of a co/wmella, and the 
great development of the pa/?, which are cemented together, so as to form a vertical tube. 
Typ. sp., Zrymhelia eburnea, Milne Edw. and J. Haime, loc. cit., p. 68. 
