WORMS. INFUSORIA. 82. Vorticclla. 221 



777. V. Catulus. Cylindrical, with a plain aperture, and 

 reflected cloven tail. 



Adorns Microfc. p. 325. tab. 27. /. 50. 



In marsliy waters, thick, mufcular, variously folded : head con- 

 nected by a short neck : tail short, ending in 2 short bristles," and 

 exferted or concealed at pleafure : rotatory-organ very minute. 



77g. V. macronra. With a double rotatory organ, and 

 slender tail ending in a triple spine. 



Baker Microfc. p. 380. tab. i2./. i. 



In marshy waters} referable* V. rotatori:*, but is entirely tranf- 

 parent. 



779, V. rotatona. Cylindrical, with a double rota- 

 tory organ, and long tail furnished with 4 points.' 



Adams Microfc. p. 548. t. 26. f. 1-3. 6. 7. 1 123. t. 27. f. 46-49. 



In stagnant waters, appearing to the nak^tl eye like a ycllowiihr 

 dot, and in rain water which has stood some time in gutters and 

 cisterns ; it frequently changes its form and posture, from a long 

 taper body to a short broad flat one; the rotatory organs turn 

 like wheels with considerable velocity : tail consisting of about 

 3 retractile joints, and terminated by 4 minute hooks. 



780. V.laciijLulatai Inversely conic, with the aperture 

 Jobed : tail furnished with 2 small bristles. 



Adams Microfc. p. 547. tab. 27. /. 45. 



In pure water, transparent, cylindrical, with molecular intes- 

 tines : moving with velocity in an oblique direction. 



C. Without stem or tail. 



78!. V. Ampulla. Contained in a bottle-shaped pellu- 

 cid bag>: head divided into 2 lobes. 



Adams Microfc. p. 544. tab. 26. /. 4. 5. 



flag in the shape of a common water-bottle, in -which the ani- 

 malcule is placed, sometimes at the bottom, sometimes nearly 

 ftllii.g it. 



782. V. cratcegaria. Subglobular, clustered, and some- 

 times united by a very minute stem or tail. 



Adims Microfc. p. 400. tab. 22. /. 40. 



Found in muddy waters in the mouth of April, generally hea 

 ped together in a sphaerkalform, and often united by a common . 

 stalk. 



788. V. nasuta. Cylindrical, with a projecting point ia 

 the middle of the mouth. 



Adams t. 27-/. 38. 39. Donov. Ins, i. /. 29./. 2. 



lu stagnant waters, invisible to the naked eye, transparent, quick 

 in motion, and perpetually changing its form, rounded at the base, 

 hairy at the mouth each side : 7 otatory-organ surrounding the mid- 

 dle of the body. 



784. V. crateizformis. Nearly square, with ciliate tufts 

 behind. 



Adams Microfc. p. 543. tab. 27.7, 40. 41. 



Common in infufions of grafs, very vivacious and pellucid, with 

 the internal molecules easily seen, round, longer than it is broad* 

 with the sides convex. 



785. V. tnmcciteUa. Cylindrical, truncate at top with..- 

 short crowded fringe* 



Hill Hist, anim.p. 6. tab. i. 



In frefh water, transparent, full of blackish molecules, obtuse at 

 the bafe, tbc margin of the mouth entirely surrounded -with, *. 

 fringe, 



