. Fresh-water biology. Freshwater biology. (132) Spines lateral . Euglypha hrachiata Leidy 1878. This species may be known by the straight shell, elongate and cylindrical. Plates oval, imbricating in a regular manner. From four to six large, long spines are developed, representing prolongations of some of the lateral plates. Habitat among sphagnum. Length 104 to 128 /i. Fig. 336. Euglypha hrachiata. X 180. (After Leidy ) 132 (131) Spines usually absent, scattered when present. Euglypha aheolata Dujardin 1841. Shell ovoid, elongated, very slightly compressed if any. Plates round or oval, imbric
. Fresh-water biology. Freshwater biology. (132) Spines lateral . Euglypha hrachiata Leidy 1878. This species may be known by the straight shell, elongate and cylindrical. Plates oval, imbricating in a regular manner. From four to six large, long spines are developed, representing prolongations of some of the lateral plates. Habitat among sphagnum. Length 104 to 128 /i. Fig. 336. Euglypha hrachiata. X 180. (After Leidy ) 132 (131) Spines usually absent, scattered when present. Euglypha aheolata Dujardin 1841. Shell ovoid, elongated, very slightly compressed if any. Plates round or oval, imbricating, presenting a regular hexagonal design. Nucleus large, spherical; contractile vacuoles two in number. Pseudopodia numerous, long and straight. A common species in the ooze of ponds, among algae and mosses. Length 45 to 100 n. Fig. 337. Euglypha alveolata. X 375. (Original, from a prepared mount.) 133 (126) Aperture oval 134 134 (135) Plates bordering aperture denticulate. Euglypha ciliata Ehrenberg 1848. Shell compressed, elongate-oval. Plates oval or round, imbricated. Needle-like spines are produced from the entire surface or in a line around the lateral border of the shell. Habitat sphagnum. Length 40 to go n. Fig. 338. Euglypha ciliata, X 250. (After Penard.) 13s (134) Plates bordering aperture lobed. Euglypha compressa Caxttt 1864. Shell greatly compressed, formed of elliptical plates, imbricating and presenting a hexagonal design. Numerous spines, fusiform in shape, are produced from the lateral border of the shell. Habitat sphagnum. Length 70 to 132 ju. Fig. 339. Euglypha compressa. X 225. (After Leidy.) 136 (121) Margin of aperture not dentate. Shell oval, compressed. Placocista Leidy. Representative species. . Placocista spinosa Leidy 1874. This species may be known by the long, awl-shaped spines which are movably articulated in a line about the lateral border of the shell. Plates oval, imbricating in a regular manner. Habi- tat sphagnum. Length 100 to 13611. Fig
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
