246 APPENDIX. 



of the material they are obliged to use together in 

 a most ingenious way, by means of a secretion from 

 the mouth, and it is curious to see them adapting 

 the bits into the places which they best fit, just as 

 we see a labourer building a wall of rough chalk 

 flint. During their hard labours the caddis w^orms 

 were fed with raw meat, house-flies, &c. 



^^ It is curious to observe that, if the caddis lives 

 in a rapid stream, he builds himself a heavy house, 

 as though aware that, if he did not do so, he and 

 his house together would be swept away by the 

 stream. But in a stagnant stream, his house is 

 light, for he does not want the weight to keep him- 

 self down ; so that there may be said to be laziness 

 in the caddis family as well as in our noble selves. 



" Miss Smee's preparations have been exhibited 

 at the Zoological Society, and a paper read upon 

 the subject by the eminent naturalist, Dr. John 

 Edward Gray, of the British Museum, who was 

 pleased to pay a high compliment to Miss Smee's 

 ingenuity in devising and cleverness in carrying 

 out her experiments. 



"Fr^ink Buckland. 



"May 2, 1862." 

 " The Editress of 



'The Queen,' 'The Lady's NewsjJaper,' 

 346, Strand, W.C." 



