OfOXFOT{T>-SHIXE. 183 



Nor fliall I venture to defcribe above one of thefe neither (and 

 that only as afpecimen of what I intend of the reft, as fall as I can 

 compafsthe method of their productions) which I think I may 

 call Mufca e Phryganio ftaxatili, there being a done* as well as a 

 flick. Caddis, or Cad-worm ; in the generation of which, Nature 

 feems to obferve the following method. Firft, there appears on 

 the ftone to which many of them ftick, as in Tab. 10. Fig. 4. 

 only little bubbles of a glutinous nature, like the /pawn of frogs, 

 which by the defcent of gravel znd /and that ftick, to them, are 

 formed into ftone Caddis houfes, including the Animal therefore 

 called the ilone Caddis ; which after it has continued in its rough- 

 caftftonehoufe its due time, gets off the- ftone either to the ban}c 

 of the River, or climes up fome reed, where alfo leaving its 

 houfte, it becomes a ftye, fomwhat like in fhape to the Mujc<e 

 toCnfgjft or bifiles Moufeti* ', that come of the ftick. Caddis, only 

 it is ftiorter, and wants both the Antenna and forked bristly tail ; 

 butmoft of all like the Breife, only the Briefe is all gray, andthis 

 has a /<*<:. head and dark, brown wings. See its form, Tab. 1 o. 



26. Other water F/ys there are that come of fuch worms, cal- 

 led Ccckr/purs, Rough-coats, Pipers, (src. of which no more at pre- 

 fent till further obfervation ; but that though at laft they come 

 to be ftyinglnfecls, yet at rirft they are all of them water Animals, 

 which puts me in mind of proceeding next, 



27. To the Fifies, whereof we have a fort in the River Ifis, f^^ 

 that we call here a Pride, of the long cartilagineous fmooth kind, * %lz 

 concerning which Authors feem fo obfeure, that I know not whe- 

 ther it be defcribed at all ; or if it be, it is done fo imperfectly, 



that perhaps it may be acceptable if I contrive another. The Fifth 

 the moft like' it of any I can find, is the Lampetra parva ftuviati- 

 lis of Rondeletiu6 c , rendred by Dr. Charlton d and Dr. Merret", 

 the Stone-grig : it having a mouth cut neither perpendicularly 

 downward, nor tranfv-erfly, but hollowed as it were between 

 two cheeks, without an under jaw, after the manner of Leeches; 

 on the top of its head it has one, and on each fide /even holes 

 that fupply the place of gills ; and under the belly a fmall line, 

 reaching from the' mouth to the exit of its excrement ; it moves 



Idem. cap. u. c DepiJci6usJ!uviatiI.iap. 24. * Onomaft.Zoic<m.tit.Pi/ces,cap. Lavium. * Pinax 

 rer. Nat. Briton- p. 188. 



by 



