194 SEA-URCHINS. 



excellent instance testifying in favour of the doctrine of 

 evolution. This brief sketch may possibly give additional 

 pleasure to a sea-side sojourn, by inducing some of our 

 readers to direct their attention, first of all, to the recent 

 sea-urchins, after which they will scarcely fail to extend 

 their investigations to the fossil species so abundantly 

 distributed through our rocks ; and, we will venture to add, 

 that if thev do so their interest cannot fail to be aroused. 



