54 CHRONOLOGICAL LIST. 



1841. 



L. Agassiz, Int. Mon. Scut. 1841, July. 



Temnopleurus 



toreumaticus ! 

 Cidaris 



bothryofdes (Agass.) non Ki.ein, 

 Pleurechinus 



botliryuides ! 

 Echinus 



versicolor ! Val. = Echinus globulus Lin. 1758. 

 Microcyphus 



versicolor ! 

 Tripneustes 



ventricosus ! 

 Amblypneustes 



griseus ! 

 Toxopneustes 



pileolus ! 

 Stomopneustes 



variolaris ! 

 Tetrapygus. 

 Agarites. 



L. Agassiz, Mon. Scut. 1841. 



1841. 



Rotula 



digilata ! 

 Runa 

 Mellita 



quinquefora ! 



hcxapora ! 



similis ! = Echinus hexaporus Gmkl. 1788. 



lobata ! = Echinodiscus emarginatus Leske, 1778. 

 Encope 



emarginata ! 



tetrapora ! (Agass.) non Leske, nee Gmel. = Encope micropora Agass. 1841. 



micropora ! 



perspectiva! = Encope micropora Agass. 1841. 



cyclopora = " •• " 



oblonga ! = Echinodiscus emarginatus Leske, 1778. 



Valenciennesii = " " " " 



subclausa ! — " " » * 



Michelini ! 



Stokesii ! 

 Lobophora (AgaSS.) non Curt, nee SERV. 



bifora ! 



truncata ! = Mellita laevis Klein, 1734. 

 bijissa ! 

 aurita ! 

 Echinarachnius 



atlanticus! Gray = Scutella parma Lam. 1816. 



