302 CARDIASTER. 



Cardiaster ananchytis, 1 Leske. PI. LXIX, figs. 2 a — i, 3. 



Spatangus ananchytis, Leske. Addit. ad Kleinii Echin., p. 2-1-3, pi. liii, figs. 1, 2, 



1778. 

 Echinus ananchytis, Gmelin. Sytema Naturae, p. 3199, No. 97, 1789. 



— — Encycloped. Meth., Mollus. et Zoopli., Atlas, pi. clvii, 



figs. 7—10, 1791. 

 Ananchytes cord ata, Lamarck. Anim. sans vertebres, t. iii, p. 26, No. 8, 1816. 

 Spatangus granulosus, Goldfuss. Petref. Germanise, p. 148, pi. xlv, fig. 3, 1826. 



— ■ — Desmoulins. Etudes des Echinides, p. 410, 1835. 



— cordiformis, Woodivard. Geol. of Norfolk, p. 50, pi. v, fig. 6, 1833. 

 Holaster. granulosus, Agassiz. Prodrome, p. 16, 1836. 



— — Agassiz fy Desor. Cat. Rais. des Echinides, in Ann. des 



Sc. Nat., 3rd. ser., vol. viii, p. 27, 1847. 



— yEQUALis, Portloch. Geol. Rep. Londonderry, p. 355, pi. xvii, 1843. 



— cordiformis, Forbes. Ann. Nat. Hist., 2nd ser., vol. vi, p. 443, 1850. 

 Cardiaster granulosus, Forbes. Mem. of the Geol. Survey, decade iv, pi. ix, 1852. 



— ananchytis, d'Orbigny. Paloont. Franc, terr. Cretaces, t. vi, p. 131, pi. 



826, 1853. 



— granulosus, Forbes. Morris Catal. of Brit. Foss., 2nd ed., p. 7'i, 1854. 



— ananchytis, Desor. Synops. des Echin. Foss., p. 345, pi. xxxix, figs. 



7—9, 1857. 



— — Coquand. Bull. Soc. Geol. France, 2e sor., torn, xvi, 



p. 1010, 1860. 



— Cotteau. Echinides du Dep. de la Sarthe, p. 237, pi. li, 



fig. 2—5, 1860. 



— granulosus, Schluter. Foss. Ecbinoderm. des nordlichen Deutschlands 



Verli. d. Nat. Vereinsder Rheinl. und Westphal., Jahrg. 

 xxvi, Folge iii, Band vi, p. 251, 1869. 



Diagnosis. — Test regularly cordate ; upper surface in one variety depressed, in 

 another more elevated, Primary tubercles large and conspicuous on each side of the 

 anteal sulcus, which is wide and deep ; posterior border narrow and obliquely truncated. 



Dimensions. — This Urchin grows to a considerable size. The fine figured specimen 

 is two inches and seven tenths of an inch in length, two inches and four tenths of an inch 

 in breadth across the widest part of the ambitus, and one inch and four tenths of an inch 

 in height at the vertex. Other specimens have greater height in proportion to their 

 breadth, or greater length in proportion to their width, and others are higher and more 

 convex on the upper surface, or are flatter and more depressed throughout. 



The French specimens collected in the Sarthe, according to Mons. Cotteau, vary 

 much in their proportional dimension. Far. major. — Antero-posterior diameter 43 milli- 

 1 Termed in error Cardiaster granulosus on the explanation of figs. 2 and 3, Plate LXIX. 



