2 
ZOOPHYTES. 
Tribe L— ASTR^ACEA. 
Tentacles many, in imperfect series or scattered ; wlien gem- 
miparous, gemmation superior, tlie polyps widening above : often 
coralligenous ; coralla calcareous, cells multiradiate, lamellae pro- 
longed outward beyond the cells, and hence the surface in ag- 
gregate coralla is lamello -striate. 
Family I. Actijmidas. Not coralligenous, usually attached. 
Genera. Actinia, Anthea, Adamsia, Edwardsia, Ilyanthus, Capnea, Acti- 
necta, Epicystis, Actinodendrum, Lucernaria, Metridium, Actineria, Hetero- 
dactyla, Epicladia. 
Family II. AsTRiEiOjE. Calcareo-coralligenous ; tentacles arranged along 
the margin of the disks ; disks sometimes confluent in simple series ; coralla, 
with excavate cells, stars circumscribed, sometimes lobed or linear; lamellae, 
in aggregate coralla, interrupted usually along the middle of the septa. 
Genera. Euphyllia, Ctenophyllia, Mussa, Manicina, Caulastrsea, Tridaco- 
phyllia, Astraea, Meandrina, Monticularia, Phyllastraea, Merulina. Echinopora. 
Family III. Fungid^. Coralligenous; disks not circumscribed, tentacles 
scattered, short, and often obsolete : simple or aggregato-gemmate ; when ag- 
gregate, the disks every way confluent without interstices : coralla, generally 
with a stellate surface, and without proper cells ; lamellae, in aggregate spe- 
cies, continuous between adjacent polyp-centres. 
Genera. Fungia, Cyclolites, Herpetolithus, Halomitra, Polyphyllia, Zoopi- 
lus, Pavonia, Agaricia, Psammocora. 
Tribe II.— CARYOPHYLLACEA. 
Polyps having numerous tentacles in two or more series: 
mostly gemmiparous, gemmation inferior, buds lateral; rarely 
(as in some Cyathophyllid^) growing upward above the summit 
of the parent, but summits of polyps (the disks or adjoining 
margins) not prolate: generally coralligenous; coralla calcare- 
ous, cells many-rayed, interstitial surface not lamello-striate. 
Family I. Cyathophyllid^. Coralligenous, the corallum of each polyp 
internally at middle, usually transversely or obliquely cellular. 
Genera. Cyathophyllum, Calophyllum, Amplexus, Caninia, Arachnophyl- 
lum, Acervularia, Cystiophyllum, Clisiophyllum, Michelinia, Colunmaria, Sar- 
cinula. 
Family II. Caryophyllidje. Coralligenous ; tentacles crowded and long, 
mouths long exsert ; corallum internally not transversely cellular ; cells many- 
