Si 



HARDWICKE'S SCIENCE-GOSSIP. 



Fig. 52. Marloes Bay, Gateholm, and part of Skomer Island. 



meters to show the depth to whicli this country was 

 submerged during the last great depression of tlie 

 glacial epoch — are indicated with a clearness and 

 fulness that leave little to be desired. The per- 

 plexed geology of the Suowdon district, so ably 

 worked out by Ramsay and others, is here simplified 



Fig. 53. The Eastern Face of the Stiper stones 



to the hand of the student, as the accompanying 

 section (fig. 54) across the Snowdon range will show. 

 Mr. Symonds has a peculiarly apt style for the 

 illustration of physical geology, but he seems to be 

 himself most interested in the organic remains of 

 the rocks. How interesting the Silurian fossils 

 are, especially of the upper 

 rocks, we need not stop to 

 point out. Not the less in- 

 structive and important are 

 those of the Lower Silurians, 

 and especially of the Cam- 

 brians, as the recent researches 

 of Mr. Hicks have sufficiently 

 proved. In the limestones of 

 the upper strata, the encri- 

 nites are preserved with a 

 freshness and distinctness sel- 

 dom seen in rocks of later 

 date, and the figure now given 

 is not a whit exaggerated in 

 its delineation of their appear- 

 ance. Most lovely objects 

 were these ancient organisms, 

 ornamented in a style that we 

 might do well to copy from, 

 and study, and apply to the 

 arts. Their slender, many- 

 jointed, yet strong columns. 



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