IT is imagined that the several descriptions of River Fish, contained 

 in the foregoing pages, are abundantly sufficient for the information of 

 any mere angler. But those who are curious to know the essential 

 differences between the various species, are hereby recommended to a 

 work entitled Ichthyographia, s. Historic, Piscium, by Francis 

 WiHoughby, Esq. fol. Oxon. 1686 ; and to a posthumous work of that 

 learned man and excellent naturalist, the Rev. Mr John Ray, entitled 

 Synopsis Methodica Avium et Piscium, published by Dr Derham, 

 in octavo, 1713. 



And whereas, in page 194, &c. n. it is hinted, that the history of 

 aquatic insects is but little known ; and this stupendous branch of 

 natural science is well worthy of farther investigation ; the reader is 

 hereby directed to the perusal of the Life of the Ephemeron, an insect 

 little differing from our green and gray drake, translated from the Low 

 Dutch of Dr Swammerdam, by Dr Edward Tyson, London, quarto, 

 1681. And for his farther information on this subject, we have added, 

 as the first number of the Appendix to this work, a translation of a 

 Synopsis of these creatures, drawn out from the observations of the 

 above MrWilloughby, and exhibited in Mr Ray's Methodus Insectorum, 

 mentioned by Dr Derham in his Physico- Theology, page 234. * 



It is not for the improvement of angling alone, that the above 

 authors are referred to : the study of the works of nature is the 

 most effectual way to open and enlarge the mind, and excite in us the 

 affections of reverence and gratitude towards that Being whose wisdom 

 and goodness are discernible in the structure of the meanest reptile. 

 Farther, " The wisdom of God receives small honour from those 

 vulgar heads that rudely stare about, and, with a gross rusticity, 

 admire his works : those highly magnify him, whose judicious inquiry 

 into his acts, and deliberate research into his creatures, return the 

 duty of a devout and learned admiration." Rdigio Medici, sec. 13. 



* The fullest and plainest account, for the use of general readers, of every species of 

 insects, hitherto published in English, may be found in Insert Architecture, Iruect Tiant- 

 formations, Insect Miscellaniei, and Alphabet of Insectt. J. R. 



