. Animal activities : a first book in zoölogy. Zoology; Animal behavior. HOMOLOGIES AMONG CRUSTACEA. 103 Are there any evidences of segmentation on the under side of the thorax ? The appendages attached to the abdomen are called szvimmercts. At the end of the abdomen is the tclson, which forms with the last pair of swimmerets the tail of the shrimp. The large claws used for grasping prey. Fig. 89.—Ventral View of Crayfish. are the first pair of legs. Count the legs and swim- merets. In what ways do the swimmerets differ from the legs .^ Are all the legs alike .'' What differences do you obser\
. Animal activities : a first book in zoölogy. Zoology; Animal behavior. HOMOLOGIES AMONG CRUSTACEA. 103 Are there any evidences of segmentation on the under side of the thorax ? The appendages attached to the abdomen are called szvimmercts. At the end of the abdomen is the tclson, which forms with the last pair of swimmerets the tail of the shrimp. The large claws used for grasping prey. Fig. 89.—Ventral View of Crayfish. are the first pair of legs. Count the legs and swim- merets. In what ways do the swimmerets differ from the legs .^ Are all the legs alike .'' What differences do you obser\'e .^ In front of the legs are three pairs of foot-jaws used for passing food from the large claws to the mouth. These are called maxillipcdcs. In front of the maxilli- pedes are two pairs of maxilla:. In front of the maxillae are the mandibles. How many pairs of antennae do you find } Are they branched } How do the eyes differ from those of a grasshopper }. 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 French, Nathaniel S. (Nathaniel Stowers), 1854-. New York ; London : Longmans, Green, and Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecta, booksubjectzoology
