WORMS. INFUSORIA. ro4. Brachionus. ^ 693 
ORDER V. INFUSORIA. 
Minute fimble amimalcules, feldom vifible to 
the naked eye. 
104. BRANCHIONDUS. Body contractile, 
covered. with a fbell, and furnithed at 
the head with ciliate rotatory organs. 
*Urceolaris Bell-fhaped, with the fhe!l many-toothed at the tip and 
; rounded at the bafe: tail long, bifid at the end. 
Shaw Natur, Mifiell. tab. 195. 
Baker Microfe p. 338. tab. 12. f 7—10. 
Adams Microfc. p. $68. tab. 22. f. 36—38. 1.27. f 55, $7. 
Verticella urceolaris, Done. Brit Inj. tab. 17. f. 1, 2. 
Found frequently in ftagnant water, appearing to the naked eye 
as a fmail white fpeck: rotatory organ double, which it can 
protrude and conceal at pleafure. 
Pat; Univalve, with the fhell 2-toothed at the tip and emargi- 
nate at the bafe: tail ending in 2 briitles. 
Foblot Microfe. 1.2. tab. 4. f.F.G? - ' 
Inhabits ftagnant water of Europe: fhell flat, cryftaline, ovate- 
orbicular; head, trunk and tail diltinét. 
*Ssriatuss Univalve, with an ovate ftriate fhell 6-toothed at the tip 
and entire at the bafe; without tail. 
Adams Microfc. p 364. tab. 27. f. 64, 65. 
In falt water: pellucid, eryltalline, truncate on the fore- part and 
rounded behind: jved/ varying in form, with 12 longitudinal 
ribs, 
Bivalve; the fhell unarmed and abbreviated at the tip and 
2 horned at the bafe: tail long ending in 2 briitles. 
Fobtor Micro. 2. p. 54. tab. 6. f. 10. A— D. 
Innabis waters of Europe; ventricole and fu^pellucid: fhell 
fhorter than the body: ead conic and bearaed each lide: 
trunk OVate. 
Cirratus. 
*Triguz, Bivalve: the fhell unarmed at the top and 3-hornec at the 
bafe: tail double. 
Adams Microfc. p $66. tab. 27. f. 59. 
Found 1n waters which have been kept fometime, very pellucid 
and neariy triangular, with a double rotatory organ, 
* Uncinatus, 
