56 CHRONOLOGICAL LIST. 



1842. 



Ravenf.l, J. A. N. Scienc. Phila. 1842, p. 333. 

 Scutella 



caroliniana = Eckinodiscus sexiesperforatus Leske, 1778. 



1843. 



J. E. Gray, Deiff. Voy. II. 1843, p. 265. 

 Echinarachnius 



zelandiae ! ? = Echinus placenta Lin. 1758. 



1843. 



Conrad, Proc. Phila. Ac. N. Sc. 1843, p. 327. 

 Spatangus 



orthonotus = Echinoeardium pennatifidum Norm. 18G7? 



1844. 



L. Agassiz, Bull. Soc. Geol. Fr. 1844, p. 730, August. 

 Metaporhinus. 



1844. 



McCoy, Synopsis Carb. Lim. foss. Ireland, 1844, p. 173. 



Palaechinus Scon.. 



Archeocidaris. 



Diplopodia. 



1844. 



Forbes, Proc. Lin. Soc. 1844, p. 183, January. 

 Amphidetus 



mediterraneus. 



1844. 



Miciielin, Rev. Mag. Zool. 1844, p. 173, Mai. 

 Diadema 



Desjardinsii! = Diadema turcarum ScnrN. 1711. 



1844. 



Duben och Koren, Ofvers. af K. Vetensk. Ak. Forh. 1844. 

 Cidaris 



borealis! = Cidaris papillata Leske, 1778. 



1845. 



Michelin, Rev. Mag. Zobl. 1845, January. 

 Diadema 



Savignyi! = Diadema selosa (Gray,) 1825, non Rumph. 

 Cidarites 



papillaris ! = Cidarites baculosa Lam. 1816. 



