CLASSIFICATIONS OF ZOOPHYTES. 
75 
pierced with oscula and numerous pores, but without mouths or 
distinct individual animals, always adherent, and composed of a fi- 
bre-gelatinous substance, intermixed or not with calcareous or si- 
liceous spicula, with internal buds or gemmules not localized. 
This embraces the sponges only, divided into the following genera— 
Alcyonellum, Spongia, Calcispongia, Halispongia, Spongilla, Geo- 
dia, Caeloptychium, Siphonia, Myrmecium, Scyphia, Eudea, Hallir- 
hoa, Hippelimus, Cnenimidium, Lymnorea, Chenendopora, Tragos, 
Manon, Jerea, Tethium. 
PSEUDOZOA. 
Organized bodies not animal but vegetable. 
ClaSS I. CALCIPHYTiE. 
Family 1 . Corallince— Corallina, Jania, and Flabellaria are British 
genera. 
Family 2. Fucoidece — of which there are no native examples. 
When some years since I planned this history of our native 
zoophytes these were all the classifications that the books ac- 
cessible to me furnished for my purpose, but their imperfections 
and incongruities had been made so apparent in the progress of 
discovery, that I was induced to devise that one for my guid- 
ance which is here adopted. This method, drawn up with- 
out any foreknowledge of it, is in its main features similar to that 
proposed by Audouin and Milne-Edwards ;* and from this co- 
incidence I feel the more assured that it will be found in closer 
harmony with the structure of the animals than any of its pre- 
decessors, and not less difficult in its practical applications. It 
is then proposed to divide the British zoophytes in the first 
place into the following sub-classes and orders, whose families 
and genera will be found characterized under their respective 
heads. 
Sub- Class I. RADIATED ZOOPHYTES. 
j Body contractile in every part , symmetrical ; mouth and anus one ; 
gemmiparous and oviparous. 
Order I. Hydroida. Polypes compound, rarely single and naked* 
* Recherches pour servir a l’Histoire Nat. du Littoral de la France, Vol. i, 
p. 73 — 6, — Ann. des Sciences Nat. Part. Zool, vi. 15, 16 ; and Lam. Anim, s~ 
Vert. ii. 104. 2de edit. Paris, 1836, 
