MONOGRAPH 



OF THE GENUS 



PATELLA. 



' At distance viewed, it seems to lie 

 On its rough bed so carelessly. 

 That 'twould an infant hand obey, 

 Stretched forth to seize it in his play. 

 But let that infant's hand di'aw near, 

 It shrinks with quick instinctive fear. 

 And clings as close, as though the stoue 

 It rests upon, and it, were one ; 

 And should the strongest arm eudeavour 

 The Limpet from its rock to sever, 

 'Tis seen its loved support to clasp. 

 With such tenacity of gi'asp. 

 We wonder that such strength should dwell 

 In such a small and simple shell." — Wordsworth. 



