. Text-book of zoology for schools and colleges. Zoology. 132 INVERTEBRATE ANIMALS. he can change it at will when too small or otherwise incon: venient. The first pair of legs are developed into pretty powerful nipping-claws or chelse, and one of them is always much larger than the other, and acts as a kind of plug, block- ing up the entrance of the shell when the animal is retracted within it. C. Brachywa.—^The decapod Crustaceans included in this tribe are familiarly known as crabs, and they derive their name of Brachyura (G. irachus, short; and oura, tail) from. I^G. 51.—^Brachyura. The Spi
. Text-book of zoology for schools and colleges. Zoology. 132 INVERTEBRATE ANIMALS. he can change it at will when too small or otherwise incon: venient. The first pair of legs are developed into pretty powerful nipping-claws or chelse, and one of them is always much larger than the other, and acts as a kind of plug, block- ing up the entrance of the shell when the animal is retracted within it. C. Brachywa.—^The decapod Crustaceans included in this tribe are familiarly known as crabs, and they derive their name of Brachyura (G. irachus, short; and oura, tail) from. I^G. 51.—^Brachyura. The Spiny Spider-crab {Maia sguiTUXdo). the rudimentary condition of the abdomen. The abdomen, in fact, is not only extremely short, but it is always tucked up beneath the greatly-developed cephalo-thorax, so that it is not visible at all, except when the animal is looked at from below (Fig. 51). The crabs are very various in their habits, but they are mostly denizens of the shore, hiding beneath stones or sea-. 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 Nicholson, Henry Alleyne, 1844-1899. New York, D. Appleton and Co.
Size: 1770px × 1411px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
