194 



NOTES 



On Foreign Jurassic species or the genus MAGNOTIA, nearly allied to the 

 British form, but which have not yet been found in the English Oolites. 



Magnotia Nodoti, Miehelin. Rev. et Mag. ZooL, No. 1, 1853. 



Test hemispherical ; ambulacra narrow, with four rows of tubercles ; inter-ambulacra 

 with twelve rows ; tubercles of both areas of a uniform size, and not sensibly increased at 

 the circumference ; mouth opening large, occupying the greater portion of the base. 



Formation. — Inferior Oolite d'Avesne (Cote-d'Or). 



Collection. — Museum of Dijon ; a single specimen, which forms the type of this genus. 



Magnotia nodulosa, Miinsfer. Syn. Echinus nodulosus, Miinst., in Goldfuss, Petrefact. 



Germ., tabl. 40, fig. 16. 



Test nearly hemispherical, more or less sub-pentagonal ; ambulacra with four rows of 

 tubercles, diminishing to two ; inter-ambulacra divided by a median depression, and 

 furnished with from eight to ten rows, disposed in slightly arched horizontal lines ; the 

 tubercles are a little larger at the circumference, and much larger at the base ; they are 

 nearly uniform in size in both areas ; mouth opening large ; apical disc very narrow, in the 

 form of a ring. 



Formation. — Coral Rag of Baireuth, and Nattheim. 



Collections. — Museums of Bonn, Tiibingen. 



Magnotia Jurassica, Cotteau. Syn. Arbacia Jurassica, Cotteau, Etudes sur les Echinides, 



pi. 20, figs. 6—11. 



Test small, flat below, inflated above ; ambulacra with four rows of tubercles ; 

 inter-ambulacra with ten rows ; upper surface of the areas depressed, and naked in the 

 middle ; the horizontal series of tubercles in inclined rows ; mouth opening large ; peri- 



