SUB-ORDER D CHILOSTOMATA 
bo 
10) 
or 
Family 3. Gemellariidae. Busk. 
Zoarium sub-caleareous, flexible, continuous.  Zoecia somewhat obconical, opposite, 
usually in pairs, unarmed, Recent. 
Gemellaria, Savigny ; Scruparia, Hincks ; Notamia, Fleming. 
Family 4. Cellariidae. Hincks (Salicornariadae, Busk.) 
Zoarium erect, sub-cylindrical, dichotomously branching, wsually 
jointed. Zoecia rhomboidal or hexagonal, each corresponding to an 
area, and disposed in series about an imaginary axis ; front depressed, 
usually concave. Orifice crescentic or semi-circular, situated slightly 
above the centre of the cell. Occia inconspicuous, opening at or near 
the summit of the area above the ortfice. Avicularia usually present. 
Cretaceous to Recent. 

Cellaria, Lam. (Salicornaria, Cuv.; Salicornia, Schweigg), (Fig. 
472). Zoarium jointed, the segments sub-cylindrical and connected by mie Hs 
> : d aon re SIZ. 
flexible, horny tubes. Zocecia immersed, surrounded by a raised Colic eimbfenn 
A . . ° . . > 2 4 Ler. OTUs 
border, disposed in quincunx. Avicularia irregularly distributed, Goldf. sp. Oligocene; 
- 3 : ; > 3 Kaufungen, near 
situated above a cell, or occupying the place of one. 
Cassel. Enlarged 
(after Reuss). 
Family 5. Selenariidae. Busk. 
Zoaria circular or irregular in outline, the celluliferous side convex, the lower concave or 
flat, probably free in the mature condition. Upper surface areolated, the zocecia immersed, 

Fic. 473. 
Lunulites Goldfussi, Hagw. Upper Cretaceous, Liineburg. «a-c, Zoarium of the natural size ; d, Upper sur- 
face, enlarged ; e, Lower surface, enlarged. 
their borders elevated. Orifice rounded or semi-elliptical, situated more or less in advance 
of the depressed front. Small vibracular cells usually present. Cretaceous to Recent. 
LTunulites, Lamx. (Fig. 473). Zocecia arranged in series radiating from the centre 
and bifurcating as they advance toward the border. Vibracular cells usually elongate, 
lying in linear series between the rows of zomcia. Very abundant in the Upper 
Cretaceous and Tertiary ; also Recent. 
Stichopora, Hagw. emend. Busk. Vibracular cells wanting. Zocecia equal, hexa- 
gonal, not arranged in radiating series. Cretaceous. 
Selenaria, Busk. Cretaceous to Recent. 
