178 SVEN LOVEN, OX THE ECHINOIDEA DESCRIBED BY LINN.-T.US. 



of the ambiilacra. ■ — The words: *auo marginali» are not iu 

 tlie orioinal diao-nosis of the Lectiires. 



There nover was aiiy doubt about the species. 



Arachnoides placenta L. 



Breyn, Sclied. p. G4, t. 7, f. 7, 8, orig., 1732. — Klein, Disp., 

 p. 33, i. 20. f. A, />, orig. — GuALTiEui, t. 110, f. G, orig. — Klein, 

 od. gall., p. 08. t. 11, vi, iinil. Klein, 17ö4. 



1708. Rchimis phicciita. 1j. S. X. ed. 10, p. ()<^)(). 



» 17r.4. M. I.. V., |>. 714. 

 - 17(;7. S. X. od. 12, 1». 110"). 

 y / 1770. IIOUTTUYN, Xat. I list. M, p. 



52'). 

 > » ~> 177"). St. MrLLEH, Xat. Syst., VI, 



p. 154. 

 Scutolla » 181(5. Lamck., An. s. v., III. p. 11. 



1827. Blainv., Diet. pc n., XLVIJl, 



p. 225. 

 1827. Ene. I\Iéth. t. 143, f. 11, 12, 



i mit. Klein. 

 1837. DeSxMOulins, Etudes, p. 228. 

 Echinodiscus ■ » 1830. Blainv., Diet. se. n., LX, p. 



199. 

 » 1834. Id., Man. dWet., p. 218. 

 Araehnoides » » 1841. Agassiz, IMon. Sent., p. 94, 



t. 21, f. 35—42. 

 » 1855. Gray, Cat., p. 13. 

 » 1872. Al. Agassiz, Rev., p. 90, 531, 

 t. m>, f. 1, 2. 

 » » » 1874. LovÉN, Etudes, t. 51. 



Leske, who says he had never seen this speeies, gives 

 descriptions from other authors. 



» 



» :■> yy 



» » 



» » 



