-H0S 



o 

 6 



PREFACE. 



Quin ipsis doctoribus hoc esse curae velim, ut teneras adhuc 

 mentes more nutricum mollius alant, et satiari veluti quodam 

 jucundioris disciplinae lacte patiantur. Erit illud plenius interim 

 corpus, quod mox adulta setas adstringat. Hinc spes roboris. 



QUINTILIAN. 



' LESSONS on Shells ' may be considered as a 

 continuation of ' Lessons on Objects ; 9 the 

 principles of teaching illustrated in that little 

 work are here applied to an important and inter- 

 esting branch of Natural History. It is, like its 

 unpretending predecessor, a transcript of the 

 actual labours of the class-room ; and friends 

 who have visited the school, may retrace in the 

 printed work the process of which they were 

 witnesses. The end for which it is now laid 

 before the public is not that it may serve as an 

 instructive and entertaining volume to be placed 

 in the hands of children; this end is sufficiently 

 attained by several works of acknowledged 

 merit ; which, in order that the subject may be 

 more familiarly handled and more vividly con- 

 ceived, represent an imaginary group of pupils 



