I 
Grabau. — Moniloporidae. 
PLATE 2. 
Figs. 1-5. Monilopora beecheri. 
Fig. 1. A young corallum of regular growth, showing the manner of budding. 
Nat. size. 
Fig. 2. An older corallum of regular growth, showing the very regular budding 
in opposite directions. Slightly reduced. 
Fig. 3. A corallum showing irregular branching. Nat. size. 
Fig. 4. Enlargement of a cross-section, showing the lamellose character of the 
wall and the reticulate structure formed by the subequal division of 
the lacunae by the trabeculae. From a camera drawing, X5. 
Fig. 5. A still further enlargement of a portion of the preceding section, show¬ 
ing the character of the lamellae and trabeculae. From a camera 
drawing. 
Figs. 6-10. Ceratopora jacksoni. 
Fig. 6. From the surface of a limestone slab, showing the curved corallites 
and the distant manner of branching. Stafford limestone, Lancaster, 
Erie Co., N. Y. Nat. size. 
Fig. 7. Longitudinal section of a branch, showing the elongated character of 
the cysts, the manner of addition of the lamellae, and the character and 
disposition of the trabeculae. From a camera drawing, X5. 
Fig. 8. A cross-section of a corallite, showing a small central tube, numerous 
cysts, and numerous long trabeculae. The section through the bud on 
the right is eccentric, and does not show the true relation of the bud to 
the central tube and cysts of the main branch. From a camera draw¬ 
ing, X5. 
Fig. 9. Another cross-section, showing cysts and trabeculae. The main tube is 
on one side of the center, and shows several short spines projecting into 
it. From a camera drawing, X5. 
Fig. 10. Longitudinal section of a calyx, showing a recently formed bud fully ' 
connected with it internally. The lamellose character of the wall and 
the manner of addition of the new lamellae are shown in the section. 
Below the calyx the tube is narrowed by the formation of cysts. From 
a camera drawing, X2^. 
Figs. 11,12. Ceratopora dichotoma. 
Fig. 11. Longitudinal section of the procumbent portion of a corallite from the 
Hamilton shales of Eighteen Mile Creek, showing the lamellose char¬ 
acter of the wall, the cysts, and the trabeculae. From a camera 
drawing, X5. 
Fig. 12. Transverse section of the procumbent portion of a corallite from 
Eighteen Mile Creek, showing the change from a subtriangular to a 
circular internal section. From a camera drawing, X7. 
1-3 Coll. Yale univ. mus., 4-5 Coll. Mus. comp, zool., Cambridge, 6-12 
Author’s coll. 
