. Fresh-water biology. Freshwater biology. 41 (40) Body not elongated; spherical to ovate, slightly flexible; a short proboscis at the base of which is the mouth. Pharynx with rods. Trachelius Schrank, Representative species. . Trachelius ovum Ehrenberg 1838, Neck highly flexible. Mouth circular; pharynx with rods. Nucleus central; contractile vacuoles numerous. Endoplasm at the inner end of the pharynx usually spreads out into four or five broadly diverging ramifications. Length 300 ix. Fresh water. Fig. 474- Trachelius omm. X 8$. (After Elochmann.) Body greatly elongated, band-Kke, very flex
. Fresh-water biology. Freshwater biology. 41 (40) Body not elongated; spherical to ovate, slightly flexible; a short proboscis at the base of which is the mouth. Pharynx with rods. Trachelius Schrank, Representative species. . Trachelius ovum Ehrenberg 1838, Neck highly flexible. Mouth circular; pharynx with rods. Nucleus central; contractile vacuoles numerous. Endoplasm at the inner end of the pharynx usually spreads out into four or five broadly diverging ramifications. Length 300 ix. Fresh water. Fig. 474- Trachelius omm. X 8$. (After Elochmann.) Body greatly elongated, band-Kke, very flexible; proboscis long with mouth at the base and a row of long cilia along its ventral side. Dileptus Dujardin. Representative species. Dileptus gigas Claparede and Lachmann 1858. Body somewhat compressed, often with a pointed, tail-like prolongation. A prominent shoulder or hump often indicates the position of the mouth. Nucleus moniliform, very long. Contractile vacuoles numerous in a dorsal row. Trichocysts on the ven- tral surface of the neck. Length 500 to 800 Pond water. Fig. 475. Dileptus gigas. X no. (After Conn.) Mouth terminal; body elongated with a long proboscis. Nucleus double Lionotopsis Conn. Representative species Lionotopsis anser Conn 1905. Fig. 476. Lionotopsis anser. X 230. (After Conn.) 43 (36) Mouth usually closed; pharynx when present, without rods. . 44 With a broad hyaline border; body flattened; proboscis short, mouth on the left side. Trichocysts well developed on the right. 42 (37) 44 (45) side. Representative species. Fig. 477. Loxophyllum rostratum. (After Conn.) Loxophyllum Dujardin. Loxophyllum rostratum Cohn 1866. Anterior extremity prolonged into a dorsally re- flected, uncinate rostrum. Cilia of anterior region longer. Middle of the dorsal border crenulate, the row of trichocysts extending from this region forward nearly to the tip of the rostrum. Nuclei multiple, central; a number of contractile vesicles posterior. Length 190 li. Recorded
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
