a round point on the angles themselves. Next to each of these is an 

 asteria which does not project, but which is ornamented on its sides 

 by round points disposed in the form of a flowret, and on its angles 

 by single round points. These include another asteria, which par- 

 takes, but in a less degree, of the ornaments of each of the preced- 

 ing. It is encircled by a line which does not project, nor swell out, 

 as in the first described, but it is ornamented with a flowret somewhat 

 similar to, but not so large, as that which is to be seen on the asterioe 

 which are next to it. 



The column, Fig. 57? has a neat as well as a rich appearance, in con- 

 sequence of being composed of asteria, the angles in some of which 

 are more acute, and the intervening recesses greater than in others. 

 In the column represented Fig. 58, a very neat form is observable : 

 the column is composed of similar asteriae, possessing considerable in- 

 dentations on their sides, the column being characterised like the 

 one Fig. 52, by foramina in the angular recesses of the column, in the 

 line of articulation. 



The entrochus, Plate XVI. Fig. 10, has some resemblance to the 

 one represented, Plate XIII. Fig. 55. It is rendered interesting by 

 the form and appearance of its superior part ; a depression being there 

 formed on every one of its five sides, in which were deposited the first 

 ossiculae of the vertebral processes which were there given off. 



