PLATE VIII. 
Fig. I. Ichnonea hageaoid (Sharpe). Lower Greensand : Farringdon. 
Fig. 1«, part of a zoarium, x 5 dia. ; Fig. 16, one of the 
zoarial ridges from the same seen from the side, x 5 dia. 
Cunnington Coll. [56,110.] 
Fig. 2. Idmonea alipe,% n.sp. Middle Chalk : Chatham. A zoarium 
with pinnately ribbed selvage, x 8 dia. Gamble Coll. 
[D. 466.] 
Fig. 3. Idmonea alipes^\\.a\). ]\Iiddle Chalk: Chatham. A zoarium 
with a smooth selvage, x 7 dia. Gamble Coll. [D. 3843.] 
Fig. 4. Idmonea cristata (Meun. & Perg.). Middle Chalk : Chatham. 
Fig. 4«, a zoarium seen from above, x 9 dia. ; Fig. 46, side 
view of the same, x 0 dia. Vine Coll. [D. 712.] 
Fig. 5. Crisina unipora^ Orb. Middle Chalk : Chatham. Obverse 
face of a branch, x 12 dia. Gamble Coll. [D. 3979.] 
Fig. 6. Crisina unipora^ Orb. Upper Chalk : Grave.send. Fig. G(/, 
upper part of the zoarium showing obverse face, x 12 dia. ; 
Fig. 66, part of the side view of lower part of the s<une 
specimen, x 1 2 dia. Vine Coll. [D. 963.] 
Fig. 7. Crisina cenomana, Orb., var. triangularis. Middle Chalk : 
Chatham. Part of a zoarium with goncecium, x 14 dia. 
Vine Coll. ^ [D. 973.] 
Fig. 8. Crisina (Reticrisina) obliqua (Orb.). Upper Chalk : Sussex. 
A zoarium with flamboyant meshes, nat. size. Dixon Coll. 
[60,264.] 
Fig. 9. Crisina {Reticrisina) obliqua (Orb.). Middle Chalk : Chatham. 
Fig. 9a, part of a zoarium from reverse face, x 2 dia. ; 
Fig. 96, side view of one frond of the same, x 11 dia. 
Gamble Coll. [D. 3954.] 
