1 12 WORMS. INFUSORIA. 108. Burfaria. 109. Gonium. 



Cyclidium, Oval, (lightly emarginate behind, with ah exfertile tail. 

 Adam< Microfc. p. 499 n. 141. 



In pure water : body fmooth, membranaceous; pellucid, with a 

 black margin; intejiines pellucid veikles. 



Tenax, Membranaceous, rather thick before, the tail 3 times as 

 ihort as the body. 

 Adams Microfc. p. 499 n. 142. 



In water in which the fordes of the teeth has been infufed : hody 

 oval, pellucid, the fore-part truncate, the hind -part acute and 

 ending in a (hort tail. 



108. BURS ARIA. Worm very fimple, mem- 

 branaceous, hollow. 



frmcatella Ventricofe, truncate at the top. 

 Adams Microfc. />. 491. n 119. 

 In marfliy water : body white, oval, truncate at the top, with a 



large hollow defcending to the bale, with fometimes 4 or 5 



yellow eggs at the bottom. 



*Hirundi- Oval, pointed at each end, with a fharp fin each fide. 

 Tiella. Adams Microfc, ^.492 tab, 25. f 19. 



Donovan s By it. Inf. tab, 5. f. 2. 



In ditch and marfhy water: a pellucid hollow membrame, mov- 

 ing forwards like a bird in flight. 



*&upletta. Elliptic, with the edges folded over leaving a narrow longi- 

 tudinal cavity. 

 Addms Microfc. p. 492, tab. 25. /. I 8. 

 Found among duck-weed ; without vifible inteftines. 



109. GONIUM. Worm very fimple, flat, an- 

 gular, invifible to the naked eye. 



H PeRcrale. Quadrangular, pellucid, with 16 fphaerical molecules. 



Adams Microfc. p. 489. tab. 25. f 17. 



A3, Stockb. 1781. p. 21. Kl. Scbr. i.p. 15./. I — 3* 



Goeze ap. Bonnet InfeSiol p. 376. tab. q.f. 8. 



Scbr. Beytr. Nat. p. 107. tab. 4,/. 23 — 2J. 



In pure water: molecules oval, nearly equal in fize, fet in a qua- 

 drangular membrane like diamonds in a ring, the lower ones a 

 little larger than the refL- 



Pulvinatum. 



