. Zoology. Zoology. SHELLED CBUSTAGEANS. the body and feet; 1-6 are the six lobes of the legs, to the outer side of which arc attached the gill and the broad ac- cessory gill {fb). The simplest Branchiopods are bivalved, and are usually. Fig. \iil.—Limnetis brevifrons. Much enlarged. less than a tenth of an inch in length. They are called Ostracoda. Eather larger forms are the water-fleas {Daphnia), which represent the sub-order Cladocera. The most interesting sub-order is the Plnjllopodd. In them (Fig. 107, Lim- netis) and Estlicria (Fig. 108) the body and legs are entirely concealed by the l
. Zoology. Zoology. SHELLED CBUSTAGEANS. the body and feet; 1-6 are the six lobes of the legs, to the outer side of which arc attached the gill and the broad ac- cessory gill {fb). The simplest Branchiopods are bivalved, and are usually. Fig. \iil.—Limnetis brevifrons. Much enlarged. less than a tenth of an inch in length. They are called Ostracoda. Eather larger forms are the water-fleas {Daphnia), which represent the sub-order Cladocera. The most interesting sub-order is the Plnjllopodd. In them (Fig. 107, Lim- netis) and Estlicria (Fig. 108) the body and legs are entirely concealed by the large bivalve shell. In Apus (Fig. 109) Fio,,.rfaaiid Lepidurus (Fig. 110) the shield shelled ig broad and flat, concealing but a part of the body. In Brancliipus (Fig. Ill), which is common in roadside pools and in ponds in the cooler parts of the year, there is no carapace. The Phyllopods swim on their backs. Apiiis is remarkable for having 47 segments in all, and 60 pairs of limbs; certain segments bearing as many as six pairs of limbs. All the. 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 Packard, A. S. (Alpheus Spring), 1839-1905. N. Y. , Holt
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1897
