i2,f^ C O N C H O L O G Y. 



Tellens, and Pinna?. 4. Cordiformiss, or 

 Cockles. 5. the Efcallops ; and the fixth 

 and laft family are the Solens* 



This author's method is entirely arbi- 

 trary and very faulty ; nor does he cha- 

 radlerlfe a fingle family by the cardo or 

 hinge. 



Gualtleri forms his method from thofe 

 whofe valves and fides are equal or fimllar; 

 which is his firft clafs. His fecond clafs 

 confifts of thofe whofe valves are equal, and 

 their fides unequal or diflimllar : and his 

 third clafs is of Shells with unequal valves. 

 By this arrangement he rejecls the hinges 

 as charafters, and mixes all the families 

 together, folely on account of their fimi- 

 lar or diffimilar fides, &c. fo that it is im- 

 poffible to collate his method with mine, 

 in fuch manner as to be of any utility to 

 the reader. 



The 



