DESCRIPTIONS OF THE SPECIES. 
CCELENTEEATA. 
ANTHOZOA. 
Several coralla of the massive shape and a segment of a digitiforrq 
branch, which in my preliminary manuscript on the Malone fauna I 
had described as two species of Astroccenia, were eventually sub- 
mitted to Mr. T. Wayland Vaughan, who is engaged in a special studj 
of the Neozoic corals, for more detailed study than I could give them. 
Of these, Mr. Vaughan has very kindly furnished the following 
description : 
Genus ASTROCCENIA M. Edwards and Ilaime. 
As'l'K()C(KMA MALOMANA Sp. U. 
pi. ii, figs. i-;;. 
"Professor Cragin has submitted to me for study and description 
!> specimens of an Astroccenia collected by him 1.1 miles east oj 
Malone, Tex. The original substance of the skeleton has been trans 
formed in the process of fossilization into a bluish limestone; th< 
skeletal elements are now represented by crystalline calcite and tin 
interspaces are filled by the same mineral. The result of thes 
chemical changes is to make a study of the thin sections of t lit 
specimens vwy unsatisfactory. No minute structural features coulj 
be deciphered, and very often even the grosser ones of the individu; 
corallites are obliterated or can be discovered only with difficultly. 
"Apparently only one species is represented in the collection, but 
there i> a central or type form around which the other specimens can 
be grouped. The type form will be described first. 
"The corallum is a gibbous mass, with a flat base Inning a rather 
large -uid'ace; the upper surface is rather uniformly rounded or 
thrown into numerous mammillae. The intergradation between these 
two types of upper surface can be seen in the specimens before me. 
When the mammillate character has reached its maximum develop! 
ment the external appearance of the corallum is identical with that 
of the common recent West Indian Porites astreoides Lamarck. J ne 
dimensions of two large specimens, both of which possess the niam-j 
millate upper surface, are: 
mm. mm. 
Greatest breadth 113 !)G 
Least breadth 95 82 
Height ' r>:2 5C 
