S E C T I O N I. II 



guide us in our methodical arrangements; 

 they alone are the principal parts, the very 

 fabricators of the habitations, and give 

 them their forms, bulk, hardnefs, colours, 

 and all the other particulars of elegance, 

 we admire. If we were to examine at- 

 tentively thefe new or almoft unknown 

 beings, we fhall difcover, In their adlions 

 and ways of life, an infinity of admirable 

 curious and interefting particulars, capable 

 pf exciting the attention of the moft in- 

 quifitive and expert naturalifts. We fliall 

 alfo difcover, in their ftrudure, a number 

 of parts as remarkable for their forms as 

 for their funftions : this part of the ftudy, 

 therefore, fhould be ferioudy contem- 

 plated ; and not the fuperficial part, or the 

 Shells only. 



Neither Is this fuperficial arrangement, 

 or by the Shells, exempt from many and 

 great difficulties ; for Shells, in their dif- 

 ferent ftages of growth, are of very dif- 

 |erent colours and forms. It is therefore 



indlf- 



