. Fresh-water biology. Freshwater biology. THE FAIRY SHRIMPS (PHYLLOPODA) 673 60 (53) First and second post-cephalic limbs prehensile in the male; carapace distinctly bivalve, enclosing head, with concentric growth lines around a more or less prominent umbo. Family LiMNADiiDAE . 61 61 (66) With pediculated dorsal organ on front of head 62 62 (63) Shell broad oval, much flattened, sub triangular, with about 18 lines of growth; flagella of second antenna 12- to 13-segmented; 18 to 22 pairs of limbs Limnadia. Only one species Limnadia americana Morse 1875. This species was described from specimen
. Fresh-water biology. Freshwater biology. THE FAIRY SHRIMPS (PHYLLOPODA) 673 60 (53) First and second post-cephalic limbs prehensile in the male; carapace distinctly bivalve, enclosing head, with concentric growth lines around a more or less prominent umbo. Family LiMNADiiDAE . 61 61 (66) With pediculated dorsal organ on front of head 62 62 (63) Shell broad oval, much flattened, sub triangular, with about 18 lines of growth; flagella of second antenna 12- to 13-segmented; 18 to 22 pairs of limbs Limnadia. Only one species Limnadia americana Morse 1875. This species was described from specimens collected at Lynn, Massachusetts. Another possible species, Limnadia coriacea Halde- man, was collected at Cincinnati and in ditches along the Susquehanna river, but it has not been suificiently described so that its relationships can be determined. See Packard (1883, pp. 313, 314). Fig. 1041. Limnadia americana. Side view. X 3. (After Packard.). 63 (62) Shell narrow-ovate, rather prominent behind the umbones with 4 to 5 lines of growth; flageUa of second antennae 9- to lo-seg- mented; 18 pairs of limbs Eulimnadia . 64 64 (65) Shell narrow-ovate, with 4 lines of growth; telson with 12 pairs of dorsal spinules not including the terminal spine. Eulimnadia agassizii Packard 1874. This small crustacean has only been observed on Penikese Island, Massachusetts. The figure shows the large dorsal organ projecting above the eye. The valves of the carapace are whitish and very trans- parent. Their shape is regularly oval. Fig. 1042. Eulimnadia agassizii. Side view. X 4. (After Packard.). 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
