302 CARDIASTER. 



Cardiasteb ananchytis,! Leske. PL LXIX, figs. 2 a — i, 3. 



Spatangus ananchytis, Leshe. Addit. ad Kleinii Echin., p. 243, pi. liii, figs. 1, 2, 



1778. 

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



— — Encycloped. Mt'th., Melius, et Zoopb., Atlas, pi. clvii, 



figs. 7—10, 1791. 

 Ananchytes cordata, Lamai-ck. Anim. sans vertfebres, t. iii, p. 26, No. 8, 1816. 

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



— — Desmotilins. Etudes des Ecbinides, p. 410, 1835. 



— coEDiFORMis, TFoochvard. Geol. of Norfolk, p. 50, pi. v, fig. 6, 1833. 

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



— — Agassi: Sf Desor. Cat. Rais. des Ecbinides, iu Ann. des 



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



— JEQUALis, PortlocJt. Geol. Rep. Londonderry, p. 355, pi. xvii, 1843. 



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

 Caediastek GRANULOSUS, Forbes. Mem. of the Geol. Survey, decade iv, pi. ix, 1852. 



— ANANCHYTIS, d'Orhigny. Paleont. rran5. terr. Cretnces, t. vi, p. 131, pi. 



826, 1853. 



— GKANULosus, Forbes. Morris Ciital. of Brit. Foss., 2nd ed., p. 73, 1854. 



— ANANCHYTIS, Besor. Synops. des Ecbin. Foss., p. 345, pi. xxxix, figs. 



7—9, 1857. 



— — Coqxiand. Bull. Soc. Geol. France, 2e ser., torn, xvi, 



p. 1010, 1860. 



— — Cotteau. Ecbinides du Dep. de la Sartbe, p. 237, pi. li, 



fig. 2—5, 1860. 



— GRANULOSUS, Schluter. Foss. Ecbinoderm. des nordlicben Deutscblands 



Verb. d. Nat. Vereinsder Rbeinl. und Westpbal., Jabrg. 

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



Diagnosis. — Test regularly cordate ; upper surface iu 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 tbe explanation of figs. 2 and 3, Plate LXIX. 



