. Zoology. Zoology. ANATOMY OF THE LOBSTER. 81 thirteen pairs of cephalo-thoracic appendages, indicating that there are thirteen corresponding segments; these, witli the seven abdomi- nal segments, indicate that there are twenty segments in a typical Crustacean. There is a pair of stalked movable compound eyes. The ears are situated in the smaller antennae (Fig. 94, a'). In the second or larger antennaa are situated the openings of the ducts (Fig. 94, li) leading from the "green glands," while the external openings of the oviducts are situated, each on one of the third pair of thorac
. Zoology. Zoology. ANATOMY OF THE LOBSTER. 81 thirteen pairs of cephalo-thoracic appendages, indicating that there are thirteen corresponding segments; these, witli the seven abdomi- nal segments, indicate that there are twenty segments in a typical Crustacean. There is a pair of stalked movable compound eyes. The ears are situated in the smaller antennae (Fig. 94, a'). In the second or larger antennaa are situated the openings of the ducts (Fig. 94, li) leading from the "green glands," while the external openings of the oviducts are situated, each on one of the third pair of thoracic feet. It is impossible, except by counting the appendages themselves, to ascertain -with certainty the number of segments in the cephalo- thorax, the dorsal portion of the segments being more or less obso- lete, but the carapace, or shield of the head-thorax, may be seen, after close examination, to represent the second antennal and man- tilO. 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
