PLATE VI. 
Fig. 1. Plethopora arhuscula, Filliozat. Senonian — Coniacian : 
Villavard, Loir-et-Cher. Fig. la, the zoarium from the 
side, X 5 dia. ; Fig. 16, part of the same, x IJ dia. 
[D. 4924.] 
Fig. 2. OscuUpora repens (Hag.). Senonian — Maastrichter Kalk ; 
Maastricht. Obverse face of a zoarium ; x 4 dia. Vine 
Coll. [D. 1386.] 
Fig. 3. OscuUpora repens (Hag.). Senonian — Maastrichter Kalk : 
Maastricht. Basal part of another zoarium, showing the 
reverse surface and one side ; x 4 dia. Vine Coll. [D. 1386.] 
Fig. 4. Homceosolen carinatus (Reuss). Cambridge Green.sand : Cam- 
bridge. Fig. 4a, the obverse face, x 10 dia. ; Fig. 46, the 
reverse face of the same specimen, x 10 dia. ; Fig. 4c, the 
end of the stem from above, x 15 dia. .lesson Coll. 
[D. 1874] 
Fig. 5. Homceosolen carinatus (Reuss). Cambridge Greensand ; Cam- 
bridge. Fig. 5a, the obverse face of the zoarium, x 6 dia. ; 
Fig. 56, the reverse face of the same specimen. Jesson Coll. 
[D. 1880.] 
Fig. 6. Defranciopora lihiformis^ Greg. Senonian — Maastrichter 
Kalk : Maastricht. Fig. 6a, the type-specimen from the 
side, X 6^ dia. ; Fig. 66, part of the rim of a segment of 
the same specimen, x 30 dia. Vine Coll. [D. 1398.] 
Fig. 7. Fasciculipora spicata^ Greg. Senonian— Campanian ; Cijdy. 
Fig. 7a, a broken zoarium from the side, x 5 dia. ; Fig. 76, 
the same from above, x 5 dia. ; Fig. 7c, part of one side of 
the zoarium, x 10 dia. ; Fig. 7<i, the upper end of a spike, 
X 10 dia. Hottelart Coll. [30,746.] 
