. Fresh-water biology. Freshwater biology. COPEPODA 773 70 (67) First segment of right exopodite of male fifth foot has hyaline appendage 71 71 (72) Hyaline appendage of first segment of exopodite of male fifth foot at inner distal angle, endopodite of right foot about equals first segment of exopodite. Diaptomus signicauda Lilljeborg Fig. 1209. Diaptomus signicauda. ^.abdomen of female. X iiB. B, fifth feet of male. X 174- (Original.) The first segment of the abdomen of the female has a digitiform process on the right posterior border. Found in mountain regions of western United States
. Fresh-water biology. Freshwater biology. COPEPODA 773 70 (67) First segment of right exopodite of male fifth foot has hyaline appendage 71 71 (72) Hyaline appendage of first segment of exopodite of male fifth foot at inner distal angle, endopodite of right foot about equals first segment of exopodite. Diaptomus signicauda Lilljeborg Fig. 1209. Diaptomus signicauda. ^.abdomen of female. X iiB. B, fifth feet of male. X 174- (Original.) The first segment of the abdomen of the female has a digitiform process on the right posterior border. Found in mountain regions of western United States. It represents a group of species that are found in the mountain regions of the western part of the United States. The peculiar appendage of the first seg- ment of the female abdomen has given the name to the species, and is charac- teristic of the group. Collections in the Rocky Mountains and farther west are hkely to contain this or alfied species. Length of female, mm. Length of male, mm. 72 (71) HyaUne appendage of first segment of exopodite of male fifth foot on inner distal half, endopodite of right fifth foot much shorter than first segment of exopodite. Diaptomus siciloides Lilljeborg 1889. Found in the Mississippi Valley and west to California. As D. Oregon- ensis is typical of the Northern States, so D. siciloides may be considered as typical of a region a little farther to the south. It has been found from Long Island on the east to the Rocky Mountains on the west, and, while not the exclusive form, is more apt to be seen than any other, espedally along the Ohio River. Length of female, to mm. Length of male, to "'"i. Fig. 1210. Fifth f«et of male Diaptomus siciloides. X 122. (Original.) 73 (3i 8) Endopodites of first swimming feet composed of three segments. 74. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these ill
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
