ORDER I CYCLOSTOMATA 263 
same plane, slightly compressed, and divided into two equal parts by a wavy mesial 
lamina. Silurian. 
? Clausa, @’Orb. (Claviclausa, (2) Sparsicavea, VOrb.) Like Entalophora, but having 
the zocecial apertures surrounded by shallow interstitial cells, the mouths of which are 
covered in the perfect condition. Cretaceous. 
? Petalophora, Lonsd, (Cavea, VOrb. ; Canalipora, Hagw.) Cretaceous. 
Family 5. Fasciporidae. dOrbigny (emend.) 
Zowcia tubular, opening in clusters at the growing extremities, and im linear or quin- 
cuncial series on the sides of the lamelliform, 
or obconical zoaria. Accessory pores wanting. 
Cretaceous. 

Fascipora, VOrb. (Fasciporina, VOrb.) Zoaria % 
compressed, sub-ramose to lamelliform. Aper- A 
tures arranged quincuncially or somewhat 
irregularly on both sides, and on the more 
or less expanded growing extremities of the 
branches and lamellae. The lamelliform species 
resemble Diastopora, but are without a mesial 
lamina. 
Semifascipora, VOrb. (Fig. 420). Zoaria cup- 
or funnel-shaped, with only the outer surface 
poriferous, the inner covered by an epitheca. 
Poriferous face thrown into vertical ridges bear- 
ing the salient tubular mouths of one or more 
rows of zoccia. At the upper edge the ridges 
pass into large clusters of apertures. 
; Ao é ; Fic. 420. 
Conotubigera and Serietubigera, VOrb, Closely 2 
mal 1 } a Semifuscipora variabilis, VOrb. Cretaceous ; 
related to the preceding. France. Side view of zoarium, 10/). 
Family 6. Fascigeridae. dOrbigny (emend.) 
Zoaria repent or erect, lamelliform or branching, generally the latter. Zowcial apertures 
arranged in bundles or clusters, in which they are contiquous. Jura 
to Recent. 
Filifascigera, VOrb. (Fig. 421). Zoaria repent, irregularly 
branching. Apertures erect, in successive groups of from two to 
five or more. Growth terminal. Cretaceous and Tertiary. 
Reptofascigera, VOrb. (Semitubigera, d’Orb.) Zoaria repent, 
crowth terminal. Apertures in two series of clusters directed 
alternately to the right and left. Cretaceous. 
Theonoa, Lam. (Tilesia, Lam.; Fascicularia, M. Edw. ; 
Lopholepis, Hagw.; Multifascigera, ete, W@Orb.), (Fig: 422). 
Zoaria lamelliform or massive, usually free, with an epitheca on 
lower face; sometimes in superposed layers. Apertures in 

Fig. 421 elevated clusters, somewhat irregularly distributed, more or less 
Filifascigera, megaera, elongated. Growth peripheral. Jura to Tertiary. 
Lonsd. Upper Cretaceous; Fasciculipora, VOrb. (Fungella, Hagw.), (Fig. 423). Zoaria 
Vincentown, N.J. Speci- is : é Se 
men seen from above and erect, simple, or branching. Apertures crowded, limited to the 
. j 12 ops 
Dirieh) side, /, (after convex and usually expanded upper extremities of the branches. 
Sides of stems usually without pores. Jura to Tertiary. 
Frondipora, Imperato. Zoaria bushy, attached at the base ; branches free or 
