Identifier: introductiontozo00dave Title:
Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year:
1900 (
1900s) Authors:
Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects:
Zoology Publisher:
New York, Macmillan company London, Macmillian and co., ltd. Contributing Library:
MBLWHOI Library Digitizing Sponsor:
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view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: FIG. 181. — Ctibrella sanguinolenta. Nat. size. From Leuuis. THE STARFISH AND ITS ALLIES 197 Text Appearing After Image: rias vulgaris belongs to the gionpAsteroidea.1 But there areover five hundred other species of starfishes. In some ofthese — as in Asterias — the skeletal plates of the skin make a network ; in others theyform a solid calcare-ous covering. To thefirst class belong, besidesAsterias vulgaris, Aste-rias ocliraceaf which oc-curs commonly on thePacific coast from Sitka,Alaska, to San Diego,California. This has amuch thicker, more solid skin than the FIG. 182. — Solaster, a multirayed starfish. t ,-, ,. . A Reduced. From Leunis. Atlantic species. A. gi- gantea^ attains a diam-eter of over two feet.Next to A. vulgaris,our commonest Easternspecies is a smooth,leathery, blood-red star-fish, about 10 centi-metres in d i a m e t e r, called Oribrella4 san- 1 APT-TIP, star ; eTSos, form. 2 o>x/>6s, pale yellow. 3 giyanteus, gigantic. Thisspecies occurs on our Pacific FIG. 183. — Archiaster, a webbed starfish. coast.Slightly reduced. Photo, by W.H.C.P. 4 cribrum, sieve, Note About Images 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 work.