Heais doWH pendaloujly In JVater, But thofe 'whlch I have ohferved Ue along 

 on tbe top ofthe JVater. Indeed there ts another fort of Nymph^ fomewhat 

 like thefe, 'which Ifoundin AprU^ which do hangin Water jufi ns the accu^ 

 rate Swammerdam defcriheth them, But for -want of critical Obfervation 

 then and by reafon their Seafon is elapfed noiv^ I am in doubt 'ivhether they 

 end \n Tipulse, or Gnats. If they are Gnats^ they make another fort of this 

 lafi named Species, 



The fecond fort of thefe Aureli^j •which proceed not from Worms, aremuch 

 Uke the others^ only ivhiter, and more tranfparentj and theirHorns jhorter, 

 Thefe are atfirfi only a parcel of tranfparent Slime, or Jelly, fcarce difcernahle 

 from the fairefi Water ; but in the Microfccpe artificially wrought n>ith va^ 

 rious Vejjkls, This animated Sbadow hath two dark round Specks ahout its 

 Shoulders^ and two more near its Tail, very 'vijible. It lieth along in the 

 Water^ and moveth to andfro bj jirks of its Body fide-ways, By degrees this 

 Nympha (fo I call it) . becometh more vifible, jeeming to grow more compaci 

 and fuhfiantial ; at which time a darkifh colourd Vejfel runs through its Body 

 from End to End ; At this time the Eyes are very vifihle ^ and witb a Mi" 

 crofeopeyfomething like % or ^ dark Fangs are difcernable in its Mouth. From 

 this Maturity it groweth to its AurQlh-fiatey by its Head befiding inwardy 

 and the two black Spots on its Back becoming the very top ofits Head. I am 

 enclined to think they are the Antennse rolled up. Tou have here enclofed a 

 Specimen of the Aurelia, Nr, 4. Lr. b. and of the Gnat it felf, Lr. c. It 

 7vas to no purpofe to fend the Nympha^ it being not to be difcerned from the 

 Gum on the Paper. 



Thus^ Sir, I have given you the befi account that as yet I can of the AuTC- 

 \\x ofGnatSf and the 'Nymphx frcm when^e they come. But •whence all 

 t/je/e NymphsE come^ I am not able to fay. When I wrote to you beforey I 

 eoncluded they all came from the VuWqqs aquatici of Swammerdam^ or elfe 

 thofe Animalcules like fmall tranfparent Eggs, which are in great numbers to 

 he feen in Vonds and other fiagnating WaterSy Tvith a Microfcope. Perhaps 

 fome may receive tbeir Birth fromfome ofthefe. Butfor thefort in this Speci' 

 men (Nr. i.) I can give you their Pedigree from their very Eggs ; which is 

 thus. There is in Waters -wherein Gnats are bred, a yelly or Spawn floatingy 

 but having one End of it fafiened to Stones, Sticks^ or 8zc. This Spawn 

 16 full of regular Streakes : ivhich in a Microfcope manifefily apfear to he 

 Rows ofEig^-r, lih Fly-blowsy laid ve 



thus ( '^i^^^S^ ) in other Spawn fidi 



^^♦*;;tf«t.'u^*^'' ^ ._ 



ofthefe two Spawns^ ^r whether both'hreed the aforenamed Gnats, I know not 

 as yet '^ but one of the twain I am fure dothy in thts manner, viz. the Spaivn 

 cifm fome time dijfohetby and the Eggs fiick to tbe Sides oftte Glafs (wherein 



I hav^ 



