[ 343 ] 



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 es- 

 sential differences between the various species are 

 hereby recommended to a work entitled, Icbthyogra- 

 phia, s. Historia Piscium, by Francis Willughby, 

 Esq. Oxon. 1686 ; and to a posthumous work of 

 that learned man and excellent naturalist, the Re- 

 ^erend Mr. John Ray, entitled Synopsis Methodica 

 Avium & Piscium, published by Dr. Derham, in 

 Octavo, 1713. 



And whereas, in page 306, n. it is hinted^ that the 

 history of AQUATIC INSECTS is but little known; 

 vnd this stupendous branch of natural science is 

 well worthy of further investigation; the reader iS 

 hereby directed to the perusal of the Life of the 

 Ephemeron an insect little differing from our green, 

 and grey, drake, translated from the Low Dutch 

 of Dr. Swammerdam, by Dr. Edw. Tyson, London, 

 Quarto, 1681. And for his further information on 

 this subject,-- we have added, as the first number of 

 the Appendix to this work, a translation of a Sy- 

 nopsis of these creatures, drawn out from the obser- 

 vations of the above Mr. Willughby, and exhibited 

 in Mr. Ray's Methodus Insectonim, mentioned by 

 Dr. Derham in his Physico Theology, page 234. 

 It is not for the improvement of Angling > alone, that 

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