. Fresh-water biology. Freshwater biology. 252 FRESH-WATER BIOLOGY 68 (63) Flagella two; body spindle-shaped when extended; chromatophores disk-shaped . Eutreptia Perty. Representative species. . . Eutreptia -Jridis Perty 1852. Body very changeable in form. Flagella equalling the body in length. Eye-spot present. Length, when extended, 100II. Pond water. Fig. 393. Eutreptia viridis. X soo. (After Conni) 69 (76) With a thick cuticle or lorica 70 < 70 (76) Lorica present. 71 71(72) Lorica beaker-shaped or tube-shaped Ascoglena Stein. 72 (71) Lorica spherical or cylindrical, smooth or spiny. T
. Fresh-water biology. Freshwater biology. 252 FRESH-WATER BIOLOGY 68 (63) Flagella two; body spindle-shaped when extended; chromatophores disk-shaped . Eutreptia Perty. Representative species. . . Eutreptia -Jridis Perty 1852. Body very changeable in form. Flagella equalling the body in length. Eye-spot present. Length, when extended, 100II. Pond water. Fig. 393. Eutreptia viridis. X soo. (After Conni) 69 (76) With a thick cuticle or lorica 70 < 70 (76) Lorica present. 71 71(72) Lorica beaker-shaped or tube-shaped Ascoglena Stein. 72 (71) Lorica spherical or cylindrical, smooth or spiny. Trachelomonas Ehrenberg . 73 73 (74i 75) Lorica smooth, colorless . Trachelomonas lagenella Stein 1878. Lorica colorless, oval or elUptical, smooth. An obliquely projecting neck. Length 20 to 35 ^. Fresh water. Fig. 394. 7 rachelomonas lagenella. X 600. (After Stein.) 74 (73) 73) Lorica spinous, brown. Trachelomonas hispida Stein Lorica elongate-oval, with ends broadly rounded. Surface cov- ered with minute, sharp-pointed spines. A short, tube-Uke neck sometimes present. Brown in color. Length 30 to 36 ^ Pond water, with other species of the genus. Fig. 39s. Trachelomonas hispida. X 400. (After Conn.) 75 (73i 74) Lorica smooth, brown. Trachelomonas volvocina Ehrenberg 1833. Lorica nearly spherical, surface smooth, usually without a neck. Flagellum long. Color brown. Diameter 30 m- Very common among algae and other aquatic plants. Fig. 396. Trachelomonas volvocina. X 450. (After Edmondson.) 76(69) With a thick cuticle but no lorica 77 77 (78) Not flattened, ellipsoidal, with a pointed caudal process. Chloropeltis Stein. Representative species. Chloropeltis hispidula Stein 1878. Surface of the body ornamented with mi- nute spines arranged in longitudinal rows. Endoplasm green, with an eye-spot. Length 55 p. Fresh water, among diatoms. Fig. 397. Chloropeltis hispidula. X 600. (Alter Conn.) 78 (77) Flattened. ' 79. Please note that these images are extracted from scanned page
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
