. Animal biology; Human biology. Parts II & III of First course in biology. Biology. FIG. 180. FIG. 181. — Anatomy of FIG. 182. — Laying egg. FlG. 183. — Foot of spider. Illustrated Study of Spiders (Figs. 178-183). — The tarantula, like most spi- ders, has eight simple eyes (none compound). Find them (Fig. 178). How do spiders and insects differ in body ? Number of legs ? Which have more joints to legs? Does trap-door spider hold the door closed (Fig. 179)? How many pairs of spinnerets for spinning web has a spider (Spw, 180) ? Foot of spider has how many claws ? How many combs o
. Animal biology; Human biology. Parts II & III of First course in biology. Biology. FIG. 180. FIG. 181. — Anatomy of FIG. 182. — Laying egg. FlG. 183. — Foot of spider. Illustrated Study of Spiders (Figs. 178-183). — The tarantula, like most spi- ders, has eight simple eyes (none compound). Find them (Fig. 178). How do spiders and insects differ in body ? Number of legs ? Which have more joints to legs? Does trap-door spider hold the door closed (Fig. 179)? How many pairs of spinnerets for spinning web has a spider (Spw, 180) ? Foot of spider has how many claws ? How many combs on claws for holding web ? Spiders spin a cocoon for holding eggs. From what part of abdomen are eggs laid (E, 182; 2, 181) ? Find spider's air sacs, lu, Fig. 181; spinning organs, sp ; fang, /£/"; poison gland, g\ palpi, kt\ eyes, au ; nerve ganglia, og, ug\ sucking tube, sr; stomach, rf; intestine, ma; liver, le; heart, h, (black); vent, a. Give two reasons why a spider is not an insect. How does it place its feet at each step (Fig. no) ? (Does the size of its nerve ganglia indicate great or little intelligence ? Why do you think first part of body corresponds to both head and thorax of insects ?. 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1910
