PLATE XXIV. 



Dactyloidites asteroides (p. 41). 



Fig. 1. A specimen completely flattened in the siliceous slate. The subuuibrella lobes appear to 



be in their natural position, while the exumbrella portion has been pressed out and broken 



until the original form is lost. 

 Fig. 2. A specimen preserving a little of its original convexity. The central portion of the disk 



and lobes was replaced by a little very fine sand, and the exterior is almost translucent. 



It looks very much like a medusa flattened on the dark slate. 



152 



