169 



NOTES. 



Op Foreign Jurassic species op the genus HEMIPEDINA nearly allied to 

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



Hemipedina seriale, Leymerie. Mem. de la Societe Geologique de France, 1839, 



tomeii, PL 24, fig. I. 

 Wright. Monogr. Brit. Ool. Echinodermata. PL IX, fig. 3 a, b. 



Test hemispherical, subglobose above, flat below ; ambulacral areas, with two rows of 

 tubercles, nearly as large as those of the inter-ambulacra ; inter-ambulacral areas, with six 

 rows of tubercles abreast at the equator, diminishing to four, and two rows above ; a few 

 secondary tubercles are unequally distributed amongst them ; mouth opening small ; 

 peristome slightly decagonal. 



Formation. — Lower Lias, France. 



Collection. — M. Michelin, Paris. 



Hemipedina S^manni, Wright. Nov. sp. 



Test small, hemispherical ; ambulacral areas with two rows of tubercles ; inter- 

 ambulacral areas with one row of primary, and two rows of secondary tubercles, the 

 primary alternating with the secondary tubercles, but not disposed on the same line, as in 

 most other species ; tubercles of both areas nearly the same size. 



Formation. — Coral Rag, Commercey, Meuse. 



Collection. — My cabinet, kindly sent by M. Saemann, of Paris. 



