Dr. W. B. Clarke on the Crag of Suffolk. 



209 



This appears evident in the process now in operation, result- 

 ing in the formation of columnar concretions upon the face of 

 the Crag, through the chemical and mechanical agency of water 

 as it trickles down the vertical surface, cariying with it small 

 portions of sand and comminuted shells, which it deposits gene- 

 rally in a stalactitic form, the ferruginous particles held in solu- 

 tion in the water cementing the mass fii-mly together : these 

 abound in some localities in which the Crag is exposed, and have 

 been regarded by the uninitiated as fossil antlers, and have been 

 gravely collected and treasured as such. These substances vary 

 in diameter from 2 inches to the eighth of an inch, and are 

 variously contorted or branched. 



Within a short time a fragment of a jaw, apparently of a large 

 Cetacean nearly equal in size to the Greenland Whale, has been 

 discovered in the Coralline Crag, and the remains of other spe- 

 cies of the same tribe of creatures have been found in the same 

 deposit. The accompanying xylographs represent two of these 

 fossils. 



A. lateral view, and B. posterior view of a dorsal vertebra of a Cetacean 

 from the Coralline Crag of Suffolk. 



A and B are two figures of a dorsal vertebra of a Cetacean, 

 allied to the Grampus, discovered in the Coralline Crag at Orford 

 in Suffolk : the specimen is in fine condition, but a portion of the 

 spinous process and part of one of the transverse processes were 



Ann. 4 M(i(/. N. Hist. Ser. 2. Vol. viii. 14 



