Gbabau. — Moniloporitlae. 
PLATE 4. 
Figs. 1-18. Ceratopora dichotoma. (Compare also Plates 2 and 3.) 
Fig. 1. From the soft shales of the Hamilton group at Eighteen Mile Creek, 
N. Y., showing five generations of corallites. The specimen is em¬ 
bedded in the shale, the flat “lower” surface alone showing on the 
under side of the shale lamina. Slightly enlarged. 
Fig. 2. From the limestone of Canandaigua Lake, showing three generations 
of corallites. The first and second generations show strongly developed 
calices ; the corallites of the third are immature, those on the left show¬ 
ing normal adolescent terminations. Xlf- 
Fig. 3. The right bud broken away, and the left one showing a normal adoles¬ 
cent termination, though somewhat broken. X2§. 
Fig. 4. With only the calyx of the first corallit.e remaining, and showing on 
the right bud a somewhat imperfect, though normal adolescent termina¬ 
tion. X2f. 
Fig. 5. Similar to Fig. 4, showing a nearly perfect adolescent termination on 
the right bud. X2|. 
Fig. 6. An average specimen, showing a well-developed calyx and two broken 
buds. X2|. 
Fig. 7. Lateral view of an average specimen, showing the height of the calyx 
and the manner of change of the diagonal lines of growth to a horizon¬ 
tal position in the calyx. X2f. 
Fig. 8. Showing the beginnings of the calyx in the formation of an upward- 
turning frontal lip, and the lateral broadening preparatory to budding. 
X2|. (Compare Figs. 9 and 10.) 
Fig. 9. Lateral view of a specimen from Eighteen Mile Creek, showing the 
directions of the lines of growth on the procumbent tube and the bud, 
and the change to a horizontal position on the calyx. X3|. 
Fig. 10. Front view of the same specimen, showing, by the lines of growth, the 
upward-turning frontal lip, which finally merges into the calyx wall. 
X3^. (Compare Figs. 7 and 8.) 
Figs. 11, 12. Showing the intergrowth of two corallites meeting near the center 
of the corallum. X4. Compare Fig. 1. 
Fig. 13. Showing an irregularity in the angle of divergence of the right bud. 
X2|. 
Fig. 14. Left bud either atrophied or broken away, and the scar healed over. 
X3|. (Compare PI. 3, figs. 9, 10.) 
Fig. 15. Indicating an injury to the left polypite which caused the contraction 
of the tube into a terminal cone. X3’-. 
Fig. 10. Showing a repaired injury in the lower portion of the tube, and a 
rebudding on the right side after the destruction of the first bud. X3 1 ,. 
Figs. 17, 18. Two views of an attached specimen, showing features character¬ 
istic of C. distorta. X3^. 
1, 9-10, Author’s coll., 2-8, 11-18, Coll. Yale univ. museum. 
