. Fresh-water biology. Freshwater biology. 778 FRESH-WATER BIOLOGY 91 (90) With sensory hair on twelfth antennal segment, hyahne pkte of seventeenth antennal segment deeply notched, egg sacs lying close to abdomen. . Cyclops fuscus Jurine 1820. Cyclops fuscus and C. albidus resemble each other very closely, and it is only by a careful examination that they can be distinguished. They are very com- mon, especially in pond collections, Cyclops albidus being found much the more frequently. They are much larger than C. leuckarti and the furcal armature dif- fers in that the lateral seta is placed n
. Fresh-water biology. Freshwater biology. 778 FRESH-WATER BIOLOGY 91 (90) With sensory hair on twelfth antennal segment, hyahne pkte of seventeenth antennal segment deeply notched, egg sacs lying close to abdomen. . Cyclops fuscus Jurine 1820. Cyclops fuscus and C. albidus resemble each other very closely, and it is only by a careful examination that they can be distinguished. They are very com- mon, especially in pond collections, Cyclops albidus being found much the more frequently. They are much larger than C. leuckarti and the furcal armature dif- fers in that the lateral seta is placed near the end of the ramus (Fig. 1223). The form of the fifth feet and of the furcal rami will readily serve to show when we have one of these two species, and in most casesit will prove to be Cyclops albidui. Length of female, about 2 mm. Fig. 1224. Antennal segments of female Cyclops fuscus. X 137. (Original.) 92 (78, 93) Antennae composed of sixteen segments, fifth feet of three seg- ments Cyclops modestus Herrick 1883. This species is comparatively rare altho it has been found in a con- siderable number of places. It occurs as far east as Pennsylvania, as far west as Wyoming, while its northern and southern limits are Wis- conBin and Alabama. Length of female, to Fig. 1225. Cyclops modestus. A, abdomen of fwnale. X 179. B, fifth foot. X 448. (Original.) 93 (78, 92) Antennae composed of twelve segments, fifth feet of one segment, 94 94 (97) Fifth feet armed with three setae, swimming feet composed of three segments 95. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
