CHRONOLOGICAL LIST. 55 



1841. L. Agassiz (continued). 

 Arachnoides 



placenta ! 

 Scutellina 

 Laganum 



depressum ! Less. 



ellipticum = Laganum depressum Less. 1841. 



decagonum! = Scutella decagonalis Less. 1827. 



Tonganense! Q. G. = Laganum depressum Less. 1841. 



Lesueuri ! Val. = Scutella decagonalis Less. 1827. 



elongatum ! 



rostratum ! 



orbiculare ! 



marginale ! = Echinodiscus orbicularis Leske, 1778. 



stellatum ! = Laganum Peronii Agass. 1841. 



Peronii ! 

 Moulinia 



cassidulina ! 



1841. 



L. Agassiz, Introd. Valent. Anat. Genre Echinus, 1841, December. 



Echinus 



albidus! = Echinus saratilis (Lin.) 1758, non Edmph. 



pustulatus! = Echinus-miliaxis Mull. 1771. 



pulchellus! = Echinus microtuberculatus Blainv. 1825. 



decoratus ! = " 

 Microcyph us 



maculatus ! 

 Salmacis 



bicolor ! 

 Tripneustes 



subcoeruleus ! 



obtusangidus ! 

 Amblypneustes 



ovum ! 

 Oidaris 



granulata ! (Agass.) non Leske. 

 Holopneustes 



granulatus ! 

 Toxopneustes 



tuberculatus 



1842. 



Desor, Agass. Mon. Ech. Galerites, 1842. 

 Echinoneus 



cruciatus ! Agass. = Echinoneus cyclostomus Leske, 1778. 



elegans ! = Echinoneus minor Leske, 1778. 



serialis ! = Echinoneus cyclostomus Leske, 1778. 



conformis ! = Echinoneus minor, Leske, 1778. 

 Holectypus. 



