CHRONOLOGICAL LIST. 53 



1840- L. Agassiz {continued). 



Acrosalenia. 



Hemicidaris. 



Arbacia (Agass.) non Gkat. 



G-lypticus. 



1840. 



L. Agassiz, Cat. Syst. Ectyp. 1840. 



Toxaster. 



Brissopsis. 



Nucleopygus. 



G-lobator. 



Caratomus. 



Amblypygus 



Heliophora. 



Amphiope 



Encope 



grandis. 

 Echinopsis. 



Cyphosoma (Agass.) non Mann. 1837. 

 Acropeltis. 

 Coelopleurus. 

 Codiopsis. 

 Podophora 



atrata ! 

 Acrocladia 



mammillata ! 



1841. 



Gould, Rep. Inv. Mass. 1841, p. 344. 

 Echinus 



granulatusl non Gmel. = Echinus Drobachiensis Mull. 1776. 



1841. 



Forbes, British Starfishes, 1841. 

 Echinus 



Flemingii!? Ball = Echinus acutus Lam. 1816. 

 Brissus 



lyrifer ! ? 

 Amphidotus (err. typ.) Amphidetus Agass. 1836. 



cordatus ! ? 



roseus !r = Spatagus flavescens Mull. 1776. 



1841. 



Sismonda, Mem. Acad. Turin. 1841. 



An aster. 



