ZOOPHYTES. -201 



These two kinds of fossils occur both in our regular strata, and 

 in the alluvial beds ; but they are not very plentiful in either. They 

 are chiefly found in the aluminous strata, especially in the lower 

 beds. They are also seen in the dogger, but rarely; and have been 

 observed in the oolite, the upper shale, and the second shale. 



In Plate V, we have given a few of the most interesting spe- 

 cimens which have come to our hands. No. 5 is a curious fossil from 

 the alluvial cliffs at Whitby. It shews the head of an encrinite im- 

 bedded in a piece of blue limestone. The pentagonal base is very 

 conspicuous ; and from it ten branches, or arms, are seen to proceed ; 

 one from each side of each of the angular terminations of the 

 pentagon. These arms, instead of folding together to form the head 

 of a lily, are widely expanded. Each of the arms, at the distance of 

 near two inches from the base, divides into lesser arms, branching out 

 in various directions. It is observable, that on the back of this 

 specimen are found some of the starry ends of pentacrinite columns. 



No. 4 is a polished section of a specimen of encrinite, contained 

 in a nodule from the alum rock at Saltwick. It displays on the left, 

 a considerable stalk, or vertebral column; and on the right, a curious 

 bulb or turnip shaped figure. These principal figures are surrounded 

 by numerous small branches. 



No. 6 is also from the aluminous strata. In the immense number 

 of its branches, or arms, and their manner of spreading, it corresponds 

 with the briaraean pentacrinite, figured in Parkinson's Organic Re- 

 mains, II, Plates XVII and XVIII : it may therefore be termed the 

 briaraean encrinite. One peculiarity in this interesting specimen 

 must not be overlooked ; — a number of its branches, or arms, instead 

 of being round, are greatly flattened. This flatness may have resulted 

 from compression, especially as there is a longitudinal crack in most 

 of the flat parts, as may be seen in the upper part of the figure on the 

 left hand. Yet, as the flat parts are intermixed witli the round, their 



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