Volume 2

A history of British starfishes, and other animals of the class Echinodermata / [Edward Forbes].

  • Edward Forbes
Date:
1841
Catalogue details

Licence: Public Domain Mark

Credit: A history of British starfishes, and other animals of the class Echinodermata / [Edward Forbes]. Source: Wellcome Collection.

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    HCHINID/E. - CIDARITES Echinus lividus. “Lamarck. Specific Character—Rows of pores bent, five pair in each row above and centrally, but diminishing in number near the mouth; spines striated; ridges broad, smooth ; primary spmes longer than secondaries. Echinus lividus, Lamarck, | Edit. II. p. 50; 2 Edit. III. p. 367. Buarn- VILLE, Man. d’Actin. p. 228. Bennett, Lin. Trans. vol. XV. Echinus saxatilis, Linnzus ? Mutuer, Zool. Dan. Prod. 2847 ? Echinus lithophagus, Leacu, Tilloch’s Phil. Mag. vol. XX XIX. p. 100. Tue Purete Eec-Urcuin measures about two inches in diameter when deprived of its spies, sometimes a little more. The spines are usually about an inch in length, very slender and tapering, and of a deep but shining pur- ple hue. There is a variety which has the spines much shorter and thicker, and of an olivaceous green. The spines always present the same character whatever be their form, when magnified being finely striate longitu- dinally, the ridges between the strie rather broad, and both quite smooth. The primary spines are generally somewhat longer than the secondaries, but in the green variety the difference of length is very slight. When the