174 PHYLUM C@LENTERA. 
(3) Cubomedusze.—Forms with broad pseudo-velum, and other 
peculiar features. Charybdea. 
(4) Peromeduse.—Forms with four inter-radial tentaculocysts 
only. Pericolpa. 
Class III. AntHozoa (= Actinozoa) 
Polypoid forms with well-developed gullet and septa, and circumoral 
tentacles. 
(1) Zoantharia or Hexacoralla. 
(a) Actiniaria. Sea-anemones. Actinia, Anemonia, Tealia, 
Cerianthus. 
(4) Madreporaria. Stone or reef corals. 
Astrea, Madrepora, Fungia, Meandrina, 
(c) Antipatharia. ‘‘ Horny” black corals. <Antépathes. 
(2) Alcyonaria or Octocoralla. : 
Alcyonium (Dead-men’s-fingers), Zwbzgora (Organ-pipe 
coral), Coraliium (Red coral), Gorgonta, Pennatula (Sea- 
pen), AZonoxenza (non-colonial). 
Class IV. CreENopHORA 
Delicate free-swimming organisms, generally globular in form, 
moving by means of eight meridional rows of ciliated plates, or comb- 
M 
Fic. 91.—-Diagram of a Ctenophore.—After Chun. 
#., Mouth; S., sensory organ; 7., tentacle cut short; SH., 
pouch of tentacle; C., ciliated combs; ., funnel or central canal 5 
SV., paragastric canal running parallel with stomodeum; G., 
other canals of the gut; ., one of the meridional canals, bear- 
ing gonads, running under the bands of ciliated combs, 
